← All Professor's Peculiarity variants
Orbiting Fire Professor's Peculiarity
This price has not changed since 2026-01-16 16:06 UTC. It reflects the last observed trade rather than current market value, and this page is excluded from our sitemap for that reason.
Community price on backpack.tf: 12.0 keys, last changed 2020-07-24 (6.2y ago). The live quote above, 20.5 keys, is 71% higher and last moved 9mo ago. They are different measures: the quote is what traders and bots are asking and bidding on the classifieds right now, and it moves for thousands of items every day; the community price is a suggestion accepted by vote, which changes only when someone argues it should. A quote well away from the vote is usually a price that is about to be re-argued. Community prices from backpack.tf, read under an hour ago.
Steam Market asking price: $55.96 — the lowest of one listing for the Orbiting Fire effect when we looked on 2026-10-10 01:40 UTC (3d ago). This is what a seller is asking, not what anything sold for. Steam pays out in Steam wallet funds, not cash, and Valve takes roughly 15% at the till — so asking prices there run well above the 20 keys, 30 ref shown above, which comes from the keys-and-metal market on backpack.tf. The two are different markets and are never blended. Steam lists the item as “Unusual Professor's Peculiarity”, with no effect in the name — the effect comes from the individual listing.
Price history
Interactive chart. Press the left and right arrow keys to move along the series, Home or End to jump to either end, Escape to clear.
The key axis converts at today's rate. Prices are recorded in metal, so a line that is flat in keys followed the key rate rather than standing still.
| Observed (UTC) | Sell | Buy |
|---|---|---|
| 25 SEP 2025 · 03:29 UTC | 11.9 keys | 9.70 keys |
| 30 SEP 2025 · 20:29 UTC | 11.9 keys | 9.74 keys |
| 9 OCT 2025 · 08:13 UTC | 11.4 keys | 10.2 keys |
| 19 OCT 2025 · 19:59 UTC | 10.8 keys | 9.74 keys |
| 25 OCT 2025 · 16:17 UTC | 10.3 keys | 9.31 keys |
| 10 NOV 2025 · 00:19 UTC | 10.9 keys | 9.79 keys |
| 19 NOV 2025 · 10:37 UTC | 20.1 keys | 11.2 keys |
| 23 NOV 2025 · 02:38 UTC | 22.0 keys | 13.3 keys |
| 7 JAN 2026 · 11:36 UTC | 20.6 keys | 9.60 keys |
| 11 JAN 2026 · 23:32 UTC | 18.5 keys | 10.8 keys |
| 16 JAN 2026 · 16:06 UTC | 20.5 keys | 9.19 keys |
Price history in numbers
11 readings since 25 Sep 2025The price has not been re-read inside the last 30 days. Over a year it ranged from 10.3 keys to 22.0 keys (up 88.8%). Today's 20.5 keys sits in the upper third of its range: the lowest we have recorded is 10.3 keys (25 Oct 2025) and the highest 22.0 keys (23 Nov 2025). The price has moved 10 times since we began recording it — about once every 11 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| a year | 10.3 keys | 22.0 keys | +88.8% | 7 | 8 |
Details
| SKU | 384;5;u33 |
|---|---|
| Last price change | 2026-01-16 16:06 UTC |
| Key rate when recorded | 64.33 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 1,600 keys | 11mo ago | |
| 1,500 keys | 11mo ago | |
| 1,350 keys | 11mo ago | |
| 780 keys | 11mo ago | |
| 527 keys | 11d ago | |
| 450 keys | 11mo ago | |
| 280 keys | 16d ago | |
| 285 keys | 12d ago | |
| 248 keys | 29d ago | |
| 228 keys | 16d ago |
Other effects on the Professor's Peculiarity
same item, different effect| Item | Value | Updated |
|---|---|---|
| 1,250 keys | 11mo ago | |
| 486 keys | 2mo ago | |
| 361 keys | 11mo ago | |
| 298 keys | 4mo ago | |
| 283 keys | 7mo ago | |
| 275 keys | 2mo ago | |
| 133 keys | 11d ago | |
| 132 keys | 12d ago | |
| 122 keys | 11d ago | |
| 116 keys | 27d ago |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
| 20.5 keys | 4mo ago | |
| 20.5 keys | 3mo ago | |
| 20.9 keys | 12d ago | |
| 20.5 keys | 18d ago | |
| 20.5 keys | 4mo ago | |
| 21.1 keys | 12d ago | |
| 20.8 keys | 12d ago | |
| 21.2 keys | 1mo ago |