← All Professor's Peculiarity variants
Poisoned Shadows Professor's Peculiarity
This price has not changed since 2026-06-28 13:12 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: 490 keys, last changed 2023-05-20 (3.3y ago). The live quote above, 298 keys, is 39% lower and last moved 2mo 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.
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 | 489 keys | 400 keys |
| 30 SEP 2025 · 20:29 UTC | 487 keys | 398 keys |
| 9 OCT 2025 · 08:13 UTC | 465 keys | 419 keys |
| 19 OCT 2025 · 19:59 UTC | 443 keys | 398 keys |
| 25 OCT 2025 · 16:17 UTC | 421 keys | 379 keys |
| 10 NOV 2025 · 00:19 UTC | 448 keys | 403 keys |
| 28 JUN 2026 · 13:12 UTC | 298 keys | 259 keys |
Price history in numbers
7 readings since 25 Sep 2025The price has not been re-read inside the last 30 days. Over a year it ranged from 298 keys to 489 keys (down 39.1%). Today's 298 keys sits at the bottom of its range: the lowest we have recorded is 298 keys (28 Jun 2026) and the highest 489 keys (25 Sep 2025). The price has moved 6 times since we began recording it — about once every 46 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| a year | 298 keys | 489 keys | −39.1% | 6 | 7 |
Details
| SKU | 384;5;u76 |
|---|---|
| Last price change | 2026-06-28 13:12 UTC |
| Key rate when recorded | 64.33 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 13,500 keys | 10mo ago | |
| 7,600 keys | 3mo ago | |
| 4,000 keys | 10mo ago | |
| 3,500 keys | 10mo ago | |
| 3,095 keys | 6mo ago | |
| 2,000 keys | 10mo ago | |
| 2,000 keys | 10mo ago | |
| 1,850 keys | 10mo ago | |
| 1,500 keys | 10mo ago | |
| 1,400 keys | 10mo ago |
Other effects on the Professor's Peculiarity
same item, different effect| Item | Value | Updated |
|---|---|---|
| 1,250 keys | 10mo ago | |
| 486 keys | 29d ago | |
| 361 keys | 10mo ago | |
| 283 keys | 6mo ago | |
| 275 keys | 18d ago | |
| 124 keys | 5h ago | |
| 121 keys | 7h ago | |
| 102 keys | 11h ago | |
| 100 keys | 9h ago | |
| 76.4 keys | 6d ago |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
 Genuine Robo-Sandvich | 297 keys | 1d ago |
| 302 keys | 5d ago | |
 Collector's Huntsman | 297 keys | 3mo ago |
| 310 keys | 11h ago | |
| 310 keys | 9h ago | |
| 309 keys | 4d ago | |
| 310 keys | 11h ago | |
| 297 keys | 1mo ago |