← All Professor's Peculiarity variants
Purple Confetti Professor's Peculiarity
Community price on backpack.tf: 20.0 keys, last changed 2025-05-09 (1.3y ago). The live quote above, 10.7 keys, is 47% lower and last moved 28d 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: $49.68 — the lowest of one listing for the Purple Confetti effect when we looked on 2026-09-01 01:39 UTC (5d 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 10 keys, 44.88 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 | 19.9 keys | 16.3 keys |
| 30 SEP 2025 · 20:29 UTC | 19.9 keys | 16.3 keys |
| 9 OCT 2025 · 08:12 UTC | 19.0 keys | 17.1 keys |
| 19 OCT 2025 · 19:59 UTC | 18.1 keys | 16.3 keys |
| 25 OCT 2025 · 16:17 UTC | 17.2 keys | 15.5 keys |
| 10 NOV 2025 · 00:19 UTC | 18.2 keys | 16.4 keys |
| 19 NOV 2025 · 10:37 UTC | 18.2 keys | 13.5 keys |
| 11 DEC 2025 · 20:48 UTC | 18.0 keys | 14.2 keys |
| 15 DEC 2025 · 00:40 UTC | 18.2 keys | 13.3 keys |
| 23 DEC 2025 · 13:07 UTC | 18.4 keys | 14.0 keys |
| 30 DEC 2025 · 20:47 UTC | 18.0 keys | 12.1 keys |
| 4 JAN 2026 · 14:46 UTC | 16.2 keys | 10.7 keys |
| 22 JAN 2026 · 01:43 UTC | 14.9 keys | 11.2 keys |
| 5 MAR 2026 · 14:42 UTC | 14.7 keys | 10.1 keys |
| 8 MAR 2026 · 14:42 UTC | 14.6 keys | 10.6 keys |
| 15 MAR 2026 · 22:07 UTC | 13.9 keys | 9.86 keys |
| 26 MAR 2026 · 20:07 UTC | 15.0 keys | 10.6 keys |
| 2 APR 2026 · 20:30 UTC | 15.1 keys | 10.7 keys |
| 18 APR 2026 · 18:30 UTC | 15.4 keys | 10.9 keys |
| 26 APR 2026 · 20:31 UTC | 14.0 keys | 10.5 keys |
| 15 MAY 2026 · 00:30 UTC | 13.1 keys | 8.81 keys |
| 24 MAY 2026 · 22:30 UTC | 12.7 keys | 8.99 keys |
| 16 JUN 2026 · 12:09 UTC | 12.1 keys | 9.04 keys |
| 16 JUL 2026 · 12:43 UTC | 10.4 keys | 8.98 keys |
| 29 JUL 2026 · 06:44 UTC | 10.5 keys | 9.19 keys |
| 5 AUG 2026 · 11:12 UTC | 10.9 keys | 9.47 keys |
| 9 AUG 2026 · 07:11 UTC | 10.7 keys | 9.34 keys |
Price history in numbers
27 readings since 25 Sep 2025The price has not been re-read inside the last 30 days. Over a year it ranged from 10.4 keys to 19.9 keys (down 46.3%). Today's 10.7 keys sits at the bottom of its range: the lowest we have recorded is 10.4 keys (16 Jul 2026) and the highest 19.9 keys (25 Sep 2025). The price has moved 26 times since we began recording it — about once every 12 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| 90 days | 10.4 keys | 12.1 keys | −11.8% | 4 | 5 |
| a year | 10.4 keys | 19.9 keys | −46.3% | 26 | 27 |
Details
| SKU | 384;5;u7 |
|---|---|
| Last price change | 2026-08-09 07:11 UTC |
| Key rate when recorded | 64.33 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 600 keys | 10mo ago | |
| 561 keys | 10mo ago | |
| 529 keys | 10mo ago | |
| 470 keys | 10mo ago | |
| 345 keys | 21d ago | |
| 256 keys | 6mo ago | |
| 255 keys | 10h ago | |
| 231 keys | 10mo ago | |
| 239 keys | 20h ago | |
| 220 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 |
|---|---|---|
| 10.7 keys | 14d ago | |
| 10.7 keys | 1mo ago | |
| 10.7 keys | 2d ago | |
| 10.7 keys | 10mo ago | |
| 10.7 keys | 18h ago | |
| 10.7 keys | 1d ago | |
| 11.0 keys | 2d ago | |
| 10.7 keys | 19d ago |