Sunday through Tuesday, September 7–9, 2026, was the week Roblox's twentieth birthday stopped being a teaser trailer and started rewriting the Limited conversation. On September 8, Roblox published three Vicennial anniversary items to the Marketplace — the Vicennial Party Hat at 105 Robux, the Confetti Cannon at 2,000 Robux, and the Birthday Time Fedora at 50,000 Robux — while promising more drops "all month long." None are limited yet, but the trading subreddits are already treating them like future flips. In the same forty-eight hours, Blox Fruits Update 30 entered day four with Magnet Fruit comps finally separating hype from habit, Adopt Me Ballet Swan formed a week-one floor above Fairytale Egg legendaries, and Spiderman Hanging — the fully sold-out 3,000-unit UGC Limited emote — cleared its resale lock on September 8 for its first tradeable day. This guide covers what moved between September 7 and 9 and how to list without quoting Magnet hour-one screenshots, buying copycat anniversary hats from unofficial creators, or trading Spiderman Hanging on day-one panic premiums.
Other hubs stayed active on different clocks. Grow a Garden Beanstalk Part 2 entered its fourth day with Chest Mimic at 0.5% from the Gold Cauldron still on a parallel Divine scarcity track from Jabberwock. Murder Mystery 2's Chroma Icecream kept splitting across trackers — Supreme Values near 1,600, mm2values.app near 1,900 — even as the Summer Event supply freeze entered its third week. Steal a Brainrot held post-Bee Lucky Block scarcity while community lists still anchor on Strawberry Elephant and Orchidox. Tag obtain methods, verify in the trade window, and post where buyers can check your work.
The 20th birthday sale: three items, one 50,000-Robux bet, and a month of speculation ahead
Roblox turned twenty on September 1, 2026. The first purchasable wave landed September 8 on the Marketplace under the official Roblox account. The Vicennial Party Hat — a white cone with gold trim, colorful stars, and a red "20" badge — costs 105 Robux and is the accessible entry point most players will actually buy. The Confetti Cannon, a silver-gray back accessory with the same anniversary badge, sits at 2,000 Robux and is the mid-tier flex collectors are watching for a potential limited flip. The Birthday Time Fedora — glossy silver with a navy band and confetti erupting from the crown — costs 50,000 Robux, roughly $500 at retail Robux rates, and is the trophy item every birthday cycle produces.
All three are on-sale with unlimited supply right now. They are not tradable Limited items yet, which means the only "trade" happening is speculation: players buying early hoping Roblox flips them off-sale and limited later, the same pattern past birthday visors and fedoras followed. Roblox has not confirmed an off-sale date or limited status. Treat every purchase as a bet, not a guarantee. Roblox Plus subscribers may see a discounted checkout on some items — players report the fedora landing near 45,000 Robux instead of 50,000 — so always check the price signed in to your own account before comparing comps with friends.
Roblox's September 1 teaser promised more drops "all month long" — a birthday visor, bucket hat, green teapot, and refreshed Horns of Pwnage and King of the Night crown are still unreleased. The original Horns trade near one million Robux today; if Roblox ships anniversary refreshes, September could see its biggest Limited shake-up in years. Copycat re-uploads from unofficial creators are already in Marketplace search — buy only from the Roblox account, ignore generator scams, and remember on-sale items have no RAP until Roblox changes their status.
Blox Fruits day four: Magnet comps settle while Gacha skins build their own economy
Blox Fruits Update 30 landed September 5 at 14:00 UTC. By September 9, day-four comps finally mean something for Magnet — the Mythical Natural-type fruit with scrap-pulling mechanics, free flight, a sword-disarming grab, and Maximum Overdrive transformation at 300 mastery. Physical Magnet trades like a novelty pull; permanent Magnet at 3,500 Robux (2,800 with Plus discount) trades like a gamepass with a 3× multiplier on community calculators. Anyone quoting a single Magnet number without tagging physical versus permanent is still guessing on day four.
The parallel market is the Magnet Gacha. Every hour at the :00 mark, Magnetic enemies spawn across your sea; defeating them drops Magnet Tokens spendable at the Gacha Dealer in Middletown. The chase tier runs from Lime Blade at 33% down to Arcsteel Magnet at 1% — separate listing category from the base fruit. Chromatic Gacha Box rolls in the shop add a Robux-paid path that inflates skin supply faster than token farming alone. Dragon also returned to the rollable Gacha pool in Update 30, which may soften permanent Dragon asks if supply spikes. Tag every Blox Fruits listing with skin name, obtain method (token farm versus Chromatic Box), and physical versus permanent type. Run the Blox Fruits values calculator the same day you accept, and do not trade multiple high-tier permanents for day-four Magnet unless you have verified the fruit's PvP ceiling against your own playstyle.
Adopt Me: Ballet Swan holds a floor while egg legendaries keep sliding
Adopt Me shipped Ballet Swan on September 4 — a limited legendary gamepass pet at 600 Robux with no Bucks alternative. By September 9, week-one listings finally had enough Traderie volume to compare against recent limited gamepass legendaries. The Limited tag matters: once Uplift removes Ballet Swan from the gamepass menu, scarcity premiums typically climb over the following weeks. Anyone quoting a fixed Ballet Swan tier on September 8 or 9 should cite their source and date.
Do not conflate Ballet Swan with Fairytale Egg legendaries. The egg dropped August 29 with Huntsman Robin and Three Blind Mice at the Legendary tier — hatchable at 1.5% from the Gumball Machine, not gamepass-only. Week-two comps for Three Blind Mice place the regular pet near 0.4–1.2 ride potions with low demand as hatch supply accumulates. Do not trade two egg legendaries for one Ballet Swan without a deliberate premium while the 600-Robux gamepass remains live. Read our Adopt Me value-sites guide before trusting a single list.
Beanstalk Part 2 day four: Chest Mimic scarcity versus Jabberwock's open floor
Grow a Garden Update 1.66.0 opened Beanstalk Event 2026 Part 2 on September 5 at 20:30 UTC. By September 9, the fourth day of Part 2 listings showed Chest Mimic — the Divine-tier pet with Mimic's Bite — sitting on a parallel scarcity track from Part 1's Jabberwock, which still had no settled floor by late August. The supported obtain route runs through Jack's shared Beanstalk contribution meter to 900 points, then Jill's Gold Cauldron with 30–75 kg of Gold-mutated plants for one Beanpod Chest. Chest Mimic lists at 0.5% from that chest — one roll per successful cauldron fill, not a guaranteed drop.
Tag every Grow a Garden offer with Part 1 versus Part 2 source and rarity confirmed in the trade window. Chest Mimic and Jabberwock are parallel Divine tracks — do not bundle them or quote Mimic Octopus summer-event values for Chest Mimic.
MM2: Chroma Icecream still cannot pick a price three weeks post-event
Murder Mystery 2's early-September quality-of-life update added official drop-rate statistics confirming Chroma weapons at 0.004%. That transparency reframed long-term Chroma comps — but Chroma Icecream from the ended Summer Event kept sliding anyway. Supreme Values listed the knife near 1,600 with a typical range of 1,400–1,600 and marked it Underpaid For. mm2values.app still held the item near 1,900 with a 1,700–1,950 range. BloxUltra quoted 2,050. That 450-point spread between the low and high anchors is not a rounding error; it is the difference between a fair trade and a loss depending on which list your counterparty cites.
Cross-check any MM2 listing on two live lists, run the MM2 calculator, and read our three-source MM2 guide before posting Chromas. When Supreme and mm2values disagree by more than 10%, cite both numbers and let the buyer choose which anchor they accept.
Limited unlocks: Silver King day two meets Spiderman Hanging's first tradeable morning
September 7 marked Silver King of the Night's resale unlock — the 95-Robux hat with 2,580 original units discovered August 6. By September 9, day-two and day-three listings were forming RAP tracks as traders who bought locked inventory through August finally flipped. On September 8, Spiderman Hanging — the 250-Robux UGC Limited emote with all 3,000 units claimed, discovered August 9 — cleared its lock for its first tradeable day. A fully sold-out limited with zero remaining original stock typically produces a sharper day-one premium than items with open stock, and Spiderman Hanging followed that pattern on Roblox Limited trading boards.
Birthday sale items are on-sale and not tradable yet — purchase receipts are not trade windows. UGC backgrounds approach unlocks around September 14–25. The four-item-per-side cap still forces multi-window upgrade scams; read our scam-avoidance guide before split offers. Plus membership is required on both sides of every Limited trade.
Steal a Brainrot: post-Bee scarcity holds while Saturday windows loom
Steal a Brainrot held steady between September 7 and 9, but post-Update 64 Bee Lucky Block brainrots — Orchidox at 0.1% and Pop Pop Petalini at 0.5% — remain in their first scarcity window. Document mutation, trait, exist count, and obtain method on every listing; Bee machine pulls and Taco Tuesday exclusives are not interchangeable comps.
September 7–9 checklist: price the week you are on
Three storylines collided at once: anniversary Marketplace items rewriting Limited speculation before they are even tradable, Magnet Gacha skins with day-four comps but no settled tier, and Spiderman Hanging opening resale on the same morning the 50,000-Robux fedora dropped. List with dates, sources, and confirmed rarity — then post where buyers can verify your work before the next Vicennial wave and September's background unlock calendar rewrite the board again.
- Buy anniversary items only from the official Roblox creator account.
- On-sale birthday items are not tradable Limiteds yet — treat purchases as speculation bets.
- Tag Magnet physical, permanent, and Gacha skins as separate markets.
- Do not trade two egg legendaries for one Ballet Swan without a deliberate premium.
- Cross-check MM2 Chroma Icecream on Supreme (near 1,600) and mm2values (near 1,900).
- Verify Silver King and Spiderman Hanging item IDs before trading unlocked UGC Limiteds.
- Refuse multi-window Limited upgrades — four slots per side is still the cap.
- Keep every trade inside the official in-game window.
September 7 through 9 was the week Roblox's twentieth birthday sale met real trading desks — anniversary items flooding Marketplace speculation, Blox Fruits Magnet finally producing day-four comps, and Limited traders juggling Silver King day-two RAP with Spiderman Hanging's first resale morning. The traders who list cleanly this week — tagged sources, verified creator accounts, two-list cross-checks — are the ones buyers trust when the next Vicennial drop lands and September's background unlocks open the next Limited wave.