Community price on backpack.tf: 7.00–8.00 keys, last changed 2019-10-03 (7.0y ago). The live quote above, 7.48 keys, is inside the community’s range and last moved 13d 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: $21.15 — the lowest of one listing for the Bubbling effect when we looked on 2026-10-06 01:47 UTC (7d 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 7 keys, 30.33 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 Fat Man's Field Cap”, with no effect in the name — the effect comes from the individual listing.
Price history
55 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.
Bubbling Fat Man's Field Cap sell price, 2025-09-25 to 2026-10-11: 55 observations, from 8.06 keys to 7.21 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
8.06 keys
5.79 keys
30 SEP 2025 · 21:56 UTC
8.10 keys
6.64 keys
19 OCT 2025 · 21:25 UTC
7.38 keys
6.64 keys
25 OCT 2025 · 17:42 UTC
7.03 keys
6.33 keys
17 DEC 2025 · 20:48 UTC
9.41 keys
6.75 keys
2 JAN 2026 · 04:49 UTC
9.02 keys
6.76 keys
14 JAN 2026 · 10:22 UTC
8.29 keys
6.01 keys
19 FEB 2026 · 08:42 UTC
7.84 keys
6.44 keys
23 FEB 2026 · 22:41 UTC
7.39 keys
6.24 keys
5 MAR 2026 · 14:44 UTC
7.33 keys
6.18 keys
27 MAR 2026 · 08:06 UTC
7.69 keys
5.42 keys
3 APR 2026 · 10:30 UTC
7.86 keys
6.14 keys
19 APR 2026 · 08:31 UTC
7.88 keys
4.64 keys
30 APR 2026 · 08:29 UTC
7.50 keys
5.77 keys
3 MAY 2026 · 16:33 UTC
7.29 keys
5.85 keys
23 MAY 2026 · 02:30 UTC
7.22 keys
5.68 keys
3 JUN 2026 · 18:31 UTC
7.31 keys
6.26 keys
15 JUN 2026 · 02:30 UTC
7.16 keys
5.89 keys
22 JUN 2026 · 21:13 UTC
6.85 keys
5.96 keys
29 JUN 2026 · 05:13 UTC
7.25 keys
6.30 keys
19 JUL 2026 · 22:44 UTC
6.39 keys
5.54 keys
26 JUL 2026 · 18:44 UTC
7.40 keys
6.42 keys
3 AUG 2026 · 12:24 UTC
7.14 keys
6.20 keys
18 AUG 2026 · 05:11 UTC
6.72 keys
5.82 keys
31 AUG 2026 · 04:09 UTC
4.81 keys
4.18 keys
2 SEP 2026 · 16:08 UTC
7.30 keys
6.35 keys
9 SEP 2026 · 16:09 UTC
7.45 keys
6.48 keys
23 SEP 2026 · 18:11 UTC
7.04 keys
6.12 keys
25 SEP 2026 · 10:08 UTC
7.13 keys
6.20 keys
26 SEP 2026 · 20:10 UTC
7.13 keys
6.20 keys
28 SEP 2026 · 16:08 UTC
7.50 keys
6.52 keys
29 SEP 2026 · 20:09 UTC
7.20 keys
6.26 keys
30 SEP 2026 · 16:09 UTC
7.48 keys
6.51 keys
5 OCT 2026 · 09:09 UTC
7.11 keys
6.19 keys
6 OCT 2026 · 11:09 UTC
7.32 keys
6.37 keys
7 OCT 2026 · 21:10 UTC
7.03 keys
6.12 keys
10 OCT 2026 · 21:09 UTC
7.10 keys
6.17 keys
10 OCT 2026 · 23:09 UTC
7.08 keys
6.16 keys
11 OCT 2026 · 05:09 UTC
6.95 keys
6.04 keys
11 OCT 2026 · 15:09 UTC
7.21 keys
6.27 keys
Price history in numbers
55 readings since 25 Sep 2025
Over the last 30 days the Bubbling Fat Man's Field Cap's sell price ranged from 6.95 keys to 7.50 keys and is up 2.4% after 17 moves. Over a year it ranged from 4.52 keys to 9.41 keys (down 2.3%). Today's 7.21 keys sits in the middle of its range: the lowest we have recorded is 4.52 keys (10 Jul 2026) and the highest 9.41 keys (17 Dec 2025). The price has moved 54 times since we began recording it — about once every 7 days.