What is The Adventure of the Birthday Surprise worth on Roblox?
As of September 16, 2026, The Adventure of the Birthday Surprise has a Recent Average Price (RAP) of 4,334 Robux and the cheapest reseller listing is 3,899 Robux. Across the 961 owned copies, its estimated market value is 4,164,974 Robux.
That puts the cheapest copy 10% below RAP. RAP averages recent completed sales, so a listing under it means sellers are currently asking less than the item has been trading for.
How rare is The Adventure of the Birthday Surprise?
The Adventure of the Birthday Surprise is a Classic Limited Hat with 961 total copies. it is sold out at the original price, so copies now trade only on the resale market. it originally sold for 37 Robux.
At 4,334 Robux, RAP sits 117x the 37 Robux it first sold for.
The Adventure of the Birthday Surprise has 4,037 favorites on the Roblox catalog.
About The Adventure of the Birthday Surprise
Surely a detective as great as Sherlock Holmes would have no surprises on his birthday. Released on Sherlock Holmes Birthday 2010.
Where to find The Adventure of the Birthday Surprise
The Adventure of the Birthday Surprise is Roblox asset ID 20335699. it was published by Roblox. on RBX Invest it sits in the Classic Limited Hats, Limiteds under 1,000 Copies, Limiteds under 10,000 R$ collections. The RAP, reseller listings, and copy counts on this page refresh from Roblox continuously, so the figures above are the state of the market at the last update rather than a fixed snapshot.