← All Professor's Peculiarity variants
Green Energy Professor's Peculiarity
This price has not changed since 2026-08-02 08:44 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: 90.0 keys, last changed 2017-09-07 (9.0y ago). The live quote above, 36.2 keys, is 60% lower and last moved 1mo 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 | 89.5 keys | 73.2 keys |
| 30 SEP 2025 · 20:29 UTC | 90.4 keys | 74.0 keys |
| 9 OCT 2025 · 08:12 UTC | 86.4 keys | 77.7 keys |
| 19 OCT 2025 · 19:59 UTC | 82.2 keys | 74.0 keys |
| 25 OCT 2025 · 16:17 UTC | 78.3 keys | 70.5 keys |
| 10 NOV 2025 · 00:19 UTC | 80.3 keys | 72.3 keys |
| 23 JUN 2026 · 07:14 UTC | 47.3 keys | 41.1 keys |
| 29 JUN 2026 · 05:13 UTC | 51.2 keys | 44.6 keys |
| 4 JUL 2026 · 12:01 UTC | 46.2 keys | 40.2 keys |
| 12 JUL 2026 · 18:45 UTC | 41.0 keys | 35.7 keys |
| 19 JUL 2026 · 22:44 UTC | 48.5 keys | 42.2 keys |
| 30 JUL 2026 · 22:43 UTC | 50.0 keys | 43.5 keys |
| 2 AUG 2026 · 08:44 UTC | 36.2 keys | 31.4 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 36.2 keys to 90.4 keys (down 59.6%). Today's 36.2 keys sits at the bottom of its range: the lowest we have recorded is 36.2 keys (2 Aug 2026) and the highest 90.4 keys (30 Sep 2025). The price has moved 12 times since we began recording it — about once every 26 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| 90 days | 36.2 keys | 51.2 keys | −23.4% | 6 | 7 |
| a year | 36.2 keys | 90.4 keys | −59.6% | 12 | 13 |
Details
| SKU | 384;5;u9 |
|---|---|
| Last price change | 2026-08-02 08:44 UTC |
| Key rate when recorded | 64.33 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 7,000 keys | 10mo ago | |
| 5,800 keys | 10mo ago | |
| 2,100 keys | 10mo ago | |
| 1,337 keys | 10mo ago | |
| 1,200 keys | 10mo ago | |
| 1,200 keys | 10mo ago | |
| 1,121 keys | 1mo ago | |
| 1,050 keys | 10mo ago | |
| 1,000 keys | 10mo ago | |
| 844 keys | 6d 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 | |
| 298 keys | 2mo ago | |
| 283 keys | 6mo ago | |
| 275 keys | 18d ago | |
| 124 keys | 4h ago | |
| 121 keys | 6h ago | |
| 102 keys | 10h ago | |
| 100 keys | 8h ago |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
| 36.9 keys | 4h ago | |
| 37.3 keys | 1d ago | |
| 36.1 keys | 16h ago | |
| 37.3 keys | 3d ago | |
| 37.6 keys | 8h ago | |
| 36.1 keys | 18h ago | |
| 37.3 keys | 3d ago | |
| 37.6 keys | 8h ago |