← All Brain Interface variants
Circling Peace Sign Brain Interface
Community price on backpack.tf: 12.0 keys, last changed 2025-07-04 (1.3y ago). The live quote above, 12.2 keys, is 2% higher and last moved 11d 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: $31.02 — the lowest of one listing for the Circling Peace Sign effect when we looked on 2026-10-07 01:43 UTC (6d 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 12 keys, 13.22 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 Brain Interface”, 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 | 12.2 keys | 9.92 keys |
| 19 OCT 2025 · 21:48 UTC | 11.1 keys | 9.97 keys |
| 10 NOV 2025 · 02:03 UTC | 11.2 keys | 10.0 keys |
| 13 JAN 2026 · 14:18 UTC | 11.8 keys | 9.49 keys |
| 5 FEB 2026 · 22:24 UTC | 11.3 keys | 9.12 keys |
| 27 FEB 2026 · 06:42 UTC | 11.9 keys | 9.01 keys |
| 15 MAR 2026 · 22:08 UTC | 11.1 keys | 7.49 keys |
| 1 APR 2026 · 02:31 UTC | 11.0 keys | 8.90 keys |
| 22 JUN 2026 · 17:13 UTC | 10.5 keys | 9.11 keys |
| 12 JUL 2026 · 22:44 UTC | 8.92 keys | 7.76 keys |
| 29 JUL 2026 · 00:45 UTC | 11.4 keys | 9.97 keys |
| 21 AUG 2026 · 02:08 UTC | 10.5 keys | 9.08 keys |
| 24 AUG 2026 · 12:09 UTC | 11.3 keys | 9.87 keys |
| 27 AUG 2026 · 08:09 UTC | 11.4 keys | 9.92 keys |
| 29 AUG 2026 · 22:09 UTC | 11.4 keys | 9.94 keys |
| 30 AUG 2026 · 22:10 UTC | 11.4 keys | 9.92 keys |
| 1 SEP 2026 · 12:09 UTC | 11.2 keys | 9.78 keys |
| 2 SEP 2026 · 14:09 UTC | 11.2 keys | 9.71 keys |
| 4 SEP 2026 · 02:08 UTC | 11.3 keys | 9.80 keys |
| 5 SEP 2026 · 18:08 UTC | 11.1 keys | 9.70 keys |
| 8 SEP 2026 · 10:09 UTC | 11.2 keys | 9.75 keys |
| 10 SEP 2026 · 00:09 UTC | 11.2 keys | 9.79 keys |
| 12 SEP 2026 · 06:08 UTC | 11.4 keys | 9.91 keys |
| 13 SEP 2026 · 06:08 UTC | 11.6 keys | 10.0 keys |
| 14 SEP 2026 · 22:08 UTC | 11.7 keys | 10.1 keys |
| 16 SEP 2026 · 04:08 UTC | 11.7 keys | 10.1 keys |
| 17 SEP 2026 · 20:08 UTC | 11.8 keys | 10.3 keys |
| 19 SEP 2026 · 10:08 UTC | 11.9 keys | 10.3 keys |
| 20 SEP 2026 · 10:09 UTC | 12.1 keys | 10.5 keys |
| 22 SEP 2026 · 04:09 UTC | 12.1 keys | 10.6 keys |
| 23 SEP 2026 · 06:09 UTC | 12.2 keys | 10.6 keys |
| 24 SEP 2026 · 22:09 UTC | 12.2 keys | 10.6 keys |
| 26 SEP 2026 · 10:08 UTC | 12.3 keys | 10.7 keys |
| 27 SEP 2026 · 12:08 UTC | 12.4 keys | 10.8 keys |
| 29 SEP 2026 · 06:08 UTC | 12.3 keys | 10.7 keys |
| 1 OCT 2026 · 00:09 UTC | 12.2 keys | 10.7 keys |
| 2 OCT 2026 · 00:09 UTC | 12.2 keys | 10.6 keys |
| 6 OCT 2026 · 11:09 UTC | 12.1 keys | 10.5 keys |
| 6 OCT 2026 · 17:09 UTC | 12.2 keys | 10.6 keys |
| 11 OCT 2026 · 03:09 UTC | 12.4 keys | 10.8 keys |
Price history in numbers
103 readings since 25 Sep 2025Over the last 30 days the Circling Peace Sign Brain Interface's sell price ranged from 11.6 keys to 12.4 keys and is up 7.4% after 41 moves. Over a year it ranged from 8.92 keys to 15.0 keys (up 12.0%). Today's 12.4 keys sits in the middle of its range: the lowest we have recorded is 8.92 keys (12 Jul 2026) and the highest 15.0 keys (22 Mar 2026). The price has moved 101 times since we began recording it — about once every 4 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| 30 days | 11.6 keys | 12.4 keys | +7.4% | 41 | 42 |
| 90 days | 10.5 keys | 12.4 keys | +13.9% | 77 | 78 |
| a year | 8.92 keys | 15.0 keys | +12.0% | 98 | 100 |
Details
| SKU | 31049;5;u18 |
|---|---|
| Last price change | 2026-10-02 00:09 UTC |
| Key rate when recorded | 62.89 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 6,400 keys | 11mo ago | |
| 1,550 keys | 11mo ago | |
| 1,460 keys | 11mo ago | |
| 800 keys | 11mo ago | |
| 570 keys | 11mo ago | |
| 375 keys | 11d ago | |
| 345 keys | 2mo ago | |
| 320 keys | 2mo ago | |
| 274 keys | 12d ago | |
| 252 keys | 2mo ago |
Other effects on the Brain Interface
same item, different effect| Item | Value | Updated |
|---|---|---|
| 100 keys | 4mo ago | |
| 93.4 keys | 13d ago | |
| 71.5 keys | 11d ago | |
| 56.8 keys | 11d ago | |
| 52.0 keys | 4mo ago | |
| 51.5 keys | 17d ago | |
| 50.0 keys | 10mo ago | |
| 42.2 keys | 12d ago | |
| 38.0 keys | 9mo ago | |
| 39.6 keys | 12d ago |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
| 12.2 keys | 11d ago | |
| 12.2 keys | 12d ago | |
| 12.4 keys | 12d ago | |
| 12.1 keys | 20d ago | |
| 12.2 keys | 11d ago | |
| 12.4 keys | 12d ago | |
| 12.2 keys | 11d ago | |
| 12.0 keys | 19d ago |