← All Professor's Peculiarity variants
Anti-Freeze Professor's Peculiarity
This price has not changed since 2026-08-18 05:11 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: 100 keys, last changed 2018-04-21 (8.5y ago). The live quote above, 72.1 keys, is 28% 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 | 99.6 keys | 81.4 keys |
| 30 SEP 2025 · 20:29 UTC | 99.4 keys | 81.3 keys |
| 9 OCT 2025 · 08:13 UTC | 95.0 keys | 85.4 keys |
| 19 OCT 2025 · 19:59 UTC | 90.3 keys | 81.3 keys |
| 25 OCT 2025 · 16:17 UTC | 86.0 keys | 77.4 keys |
| 10 NOV 2025 · 00:19 UTC | 91.4 keys | 82.2 keys |
| 3 JUL 2026 · 05:12 UTC | 89.1 keys | 77.4 keys |
| 9 JUL 2026 · 16:44 UTC | 68.2 keys | 59.3 keys |
| 15 JUL 2026 · 10:43 UTC | 68.8 keys | 59.9 keys |
| 29 JUL 2026 · 00:45 UTC | 87.9 keys | 76.4 keys |
| 3 AUG 2026 · 00:24 UTC | 85.1 keys | 74.0 keys |
| 11 AUG 2026 · 03:11 UTC | 79.0 keys | 68.7 keys |
| 18 AUG 2026 · 05:11 UTC | 72.1 keys | 62.6 keys |
Price history in numbers
13 readings since 25 Sep 2025The price has not been re-read inside the last 30 days. Over a year it ranged from 68.2 keys to 91.4 keys (down 20.2%). Today's 72.1 keys sits in the lower third of its range: the lowest we have recorded is 68.2 keys (9 Jul 2026) and the highest 99.6 keys (25 Sep 2025). The price has moved 12 times since we began recording it — about once every 27 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| 90 days | 68.8 keys | 87.9 keys | +4.7% | 4 | 5 |
| a year | 68.2 keys | 91.4 keys | −20.2% | 9 | 10 |
Details
| SKU | 384;5;u69 |
|---|---|
| Last price change | 2026-08-18 05:11 UTC |
| Key rate when recorded | 64.33 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 4,900 keys | 11mo ago | |
| 2,262 keys | 25d ago | |
| 1,500 keys | 11mo ago | |
| 912 keys | 2mo ago | |
| 750 keys | 11mo ago | |
| 725 keys | 11mo ago | |
| 661 keys | 11mo ago | |
| 500 keys | 11mo ago | |
| 500 keys | 5mo ago | |
| 481 keys | 17d 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 |
|---|---|---|
| 75.0 keys | 12d ago | |
| 73.2 keys | 12d ago | |
| 72.3 keys | 1mo ago | |
| 72.8 keys | 21d ago | |
 Strange Specialized Killstreak Festive Huntsman | 73.7 keys | 11d ago |
| 71.7 keys | 16d ago | |
| 73.7 keys | 11d ago | |
| 72.0 keys | 2mo ago |