How much is The Adventure of the Birthday Surprise worth? Price and value
As of October 17, 2026, The Adventure of the Birthday Surprise is worth about 4,216 Robux, its Recent Average Price (RAP), and the cheapest copy for sale is priced at 4,452 Robux. Across the 961 owned copies, its estimated market value is 4,051,576 Robux.
That puts the cheapest copy 6% above RAP. Sellers are holding out for more than the item has recently traded at, which is normal for a Classic Limited with few copies on the market.
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 4,216 Robux, RAP sits 114x the 37 Robux it first sold for.
The Adventure of the Birthday Surprise has 4,037 favorites on the Roblox catalog.
The Adventure of the Birthday Surprise sales history
RBX Invest has recorded 128 sales of The Adventure of the Birthday Surprise across 105 trading days since its records begin in November 2022, most recently on Sep 19, 2026.
Its highest daily average sale price was 17,999 Robux on Jul 10, 2023, and its lowest was 3,010 Robux on Nov 13, 2024.
By calendar year, its average sale price went from 6,071 Robux in 2022 to 5,077 Robux in 2026, down 16%.
| Month | Average sale price | Sales |
|---|---|---|
| Sep 2026 | 3,974 R$ | 4 |
| Aug 2026 | 4,015 R$ | 12 |
| Jun 2026 | 5,099 R$ | 12 |
| May 2026 | 5,515 R$ | 3 |
| Apr 2026 | 5,679 R$ | 4 |
| Mar 2026 | 7,941 R$ | 1 |
| Feb 2026 | 5,000 R$ | 1 |
| Jan 2026 | 6,807 R$ | 6 |
| Dec 2025 | 5,925 R$ | 2 |
| Nov 2025 | 7,486 R$ | 1 |
| Oct 2025 | 5,700 R$ | 4 |
| Sep 2025 | 6,000 R$ | 2 |
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.
How to get The Adventure of the Birthday Surprise
The Adventure of the Birthday Surprise is no longer sold by the creator, so the way to get it is to buy a copy from a reseller on Roblox. The cheapest is listed at 4,452 Robux.
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.