← All Professor's Peculiarity variants
Chiroptera Venenata Professor's Peculiarity
This price has not changed since 2026-08-09 01:11 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: 75.0 keys, last changed 2015-01-18 (11.7y ago). The live quote above, 35.4 keys, is 53% 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 | 74.6 keys | 61.0 keys |
| 30 SEP 2025 · 20:29 UTC | 74.5 keys | 61.0 keys |
| 9 OCT 2025 · 08:13 UTC | 71.2 keys | 64.1 keys |
| 19 OCT 2025 · 19:59 UTC | 67.7 keys | 61.0 keys |
| 25 OCT 2025 · 16:17 UTC | 64.5 keys | 58.1 keys |
| 10 NOV 2025 · 00:19 UTC | 66.2 keys | 59.6 keys |
| 23 JUN 2026 · 07:14 UTC | 34.1 keys | 29.6 keys |
| 7 AUG 2026 · 13:13 UTC | 35.3 keys | 30.7 keys |
| 9 AUG 2026 · 01:11 UTC | 35.4 keys | 30.7 keys |
Price history in numbers
9 readings since 25 Sep 2025The price has not been re-read inside the last 30 days. Over a year it ranged from 34.1 keys to 67.7 keys (down 47.7%). Today's 35.4 keys sits at the bottom of its range: the lowest we have recorded is 34.1 keys (23 Jun 2026) and the highest 74.6 keys (25 Sep 2025). The price has moved 8 times since we began recording it — about once every 40 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| 90 days | 35.3 keys | 35.4 keys | +0.2% | 1 | 2 |
| a year | 34.1 keys | 67.7 keys | −47.7% | 5 | 6 |
Details
| SKU | 384;5;u75 |
|---|---|
| Last price change | 2026-08-09 01:11 UTC |
| Key rate when recorded | 64.33 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 6,150 keys | 11mo ago | |
| 2,300 keys | 11mo ago | |
| 1,675 keys | 11mo ago | |
| 1,675 keys | 11mo ago | |
| 1,600 keys | 11mo ago | |
| 1,400 keys | 11mo ago | |
| 1,070 keys | 1mo ago | |
| 1,029 keys | 1mo ago | |
| 1,000 keys | 11mo ago | |
| 1,000 keys | 11mo 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 |
|---|---|---|
| 36.1 keys | 13d ago | |
| 35.6 keys | 22d ago | |
 Strange Specialized Killstreak Festive Bat | 36.2 keys | 11d ago |
| 35.4 keys | 2mo ago | |
| 36.5 keys | 1mo ago | |
| 35.4 keys | 2mo ago | |
| 36.5 keys | 12d ago | |
| 36.5 keys | 12d ago |