What is The Onyx Underkeeper worth on Roblox?
As of September 28, 2026, The Onyx Underkeeper has a Recent Average Price (RAP) of 108 Robux and the cheapest reseller listing is 95 Robux. Across the 500 owned copies, its estimated market value is 54,000 Robux.
That puts the cheapest copy 12% 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 Onyx Underkeeper?
The Onyx Underkeeper is a UGC Limited Hat with 500 total copies. It is sold out at the original price, so copies now trade only on the resale market. It originally sold for 95 Robux.
At 108 Robux, RAP sits 1.1x the 95 Robux it first sold for.
The Onyx Underkeeper has 96 favorites on the Roblox catalog.
The Onyx Underkeeper sales history
RBX Invest has recorded 650 sales of The Onyx Underkeeper across 109 trading days, from Feb 10, 2024 to Aug 17, 2026.
Sales here include copies bought from the creator’s original stock as well as resales between players. Free promotional claims are not counted.
Its highest daily average sale price was 199 Robux on Oct 27, 2025, and its lowest was 70 Robux on Apr 10, 2024.
By calendar year, its average sale price went from 91 Robux in 2024 to 101 Robux in 2026, up 11%.
| Month | Average sale price | Sales |
|---|---|---|
| Aug 2026 | 95 R$ | 2 |
| May 2026 | 95 R$ | 1 |
| Apr 2026 | 95 R$ | 1 |
| Jan 2026 | 112 R$ | 2 |
| Dec 2025 | 147 R$ | 1 |
| Oct 2025 | 131 R$ | 3 |
| Aug 2025 | 95 R$ | 4 |
| Jun 2025 | 118 R$ | 5 |
| Apr 2025 | 105 R$ | 2 |
| Mar 2025 | 103 R$ | 4 |
| Feb 2025 | 96 R$ | 7 |
| Jan 2025 | 95 R$ | 2 |
Did The Onyx Underkeeper make money for release buyers?
The Onyx Underkeeper sold out of its original stock on its first day of sales, Feb 10, 2024. Copies could be resold from Mar 11, 2024, once Roblox's 30-day resale lock ended.
Bought at the original 95 Robux, a copy had no profitable resale point in its first year once Roblox's cut is taken out.
About The Onyx Underkeeper
Cold as the steel that covers his towers walls. He doesn't know how long he's been in the depths of his tower nor if time has passed at all. When an Underkeeper becomes restless from their oath, they tend to do an assortment of odd things. This one likes reorganizing the furniture in every room two times a day, give or take.
Where to find The Onyx Underkeeper
The Onyx Underkeeper is Roblox asset ID 16304241223. It was published by [ [One[]Pixel] ] - studios. On RBX Invest it sits in the UGC Limited Hats, Limiteds under 1,000 Copies, Cheap Limiteds under 100 R$, Limiteds under 500 R$ 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.