Community price on backpack.tf: 40.0 keys, last changed 2023-12-28 (2.7y ago). The live quote above, 34.4 keys, is 14% lower and last moved 12h 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
24 observations
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.
Tainted Frost Brain Interface sell price, 2025-09-25 to 2026-09-05: 24 observations, from 41.2 keys to 34.4 keys.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
41.2 keys
33.7 keys
30 SEP 2025 · 22:22 UTC
41.2 keys
33.7 keys
9 OCT 2025 · 09:55 UTC
39.4 keys
35.5 keys
19 OCT 2025 · 21:48 UTC
37.5 keys
33.7 keys
25 OCT 2025 · 18:09 UTC
35.7 keys
32.1 keys
10 NOV 2025 · 02:03 UTC
36.6 keys
33.0 keys
23 JUN 2026 · 09:14 UTC
13.8 keys
12.0 keys
29 JUN 2026 · 03:14 UTC
13.4 keys
11.7 keys
22 JUL 2026 · 08:45 UTC
14.2 keys
12.3 keys
30 JUL 2026 · 02:44 UTC
9.33 keys
8.13 keys
7 AUG 2026 · 07:14 UTC
11.5 keys
9.96 keys
13 AUG 2026 · 21:12 UTC
9.69 keys
8.44 keys
19 AUG 2026 · 18:10 UTC
15.6 keys
13.6 keys
23 AUG 2026 · 04:09 UTC
13.5 keys
11.7 keys
25 AUG 2026 · 10:09 UTC
18.6 keys
16.1 keys
26 AUG 2026 · 06:09 UTC
16.3 keys
14.2 keys
26 AUG 2026 · 18:09 UTC
17.4 keys
15.2 keys
28 AUG 2026 · 04:09 UTC
18.0 keys
15.7 keys
30 AUG 2026 · 04:09 UTC
31.1 keys
27.1 keys
1 SEP 2026 · 08:09 UTC
34.4 keys
29.9 keys
2 SEP 2026 · 12:09 UTC
33.2 keys
28.9 keys
4 SEP 2026 · 08:09 UTC
35.5 keys
30.8 keys
4 SEP 2026 · 20:07 UTC
34.5 keys
30.0 keys
5 SEP 2026 · 08:08 UTC
34.4 keys
30.0 keys
Price history in numbers
24 readings since 25 Sep 2025
Over the last 30 days the Tainted Frost Brain Interface's sell price ranged from 9.69 keys to 35.5 keys and is up 198.6% after 13 moves. Over a year it ranged from 9.33 keys to 41.2 keys (down 16.5%). Today's 34.4 keys sits in the upper third of its range: the lowest we have recorded is 9.33 keys (30 Jul 2026) and the highest 41.2 keys (30 Sep 2025). The price has moved 23 times since we began recording it — about once every 15 days.