Community price on backpack.tf: 35.0 keys, last changed 2023-12-04 (2.8y ago). The live quote above, 25.5 keys, is 27% lower and last moved 10h 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: $112.24 — the lowest of one listing for the Purple Energy effect when we looked on 2026-09-03 01:39 UTC (3d 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 25 keys, 30.22 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 Fat Man's Field Cap”, with no effect in the name — the effect comes from the individual listing.
Price history
23 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.
Purple Energy Fat Man's Field Cap sell price, 2025-09-25 to 2026-09-05: 23 observations, from 36.2 keys to 25.5 keys.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
36.2 keys
29.6 keys
30 SEP 2025 · 21:56 UTC
37.2 keys
30.4 keys
9 OCT 2025 · 09:33 UTC
35.5 keys
32.0 keys
19 OCT 2025 · 21:25 UTC
33.8 keys
30.4 keys
25 OCT 2025 · 17:42 UTC
32.2 keys
29.0 keys
10 NOV 2025 · 01:42 UTC
31.7 keys
28.5 keys
8 MAY 2026 · 18:32 UTC
37.3 keys
31.1 keys
17 MAY 2026 · 16:32 UTC
37.1 keys
31.0 keys
23 MAY 2026 · 20:32 UTC
37.0 keys
30.9 keys
1 JUN 2026 · 02:30 UTC
37.5 keys
31.3 keys
8 JUN 2026 · 00:32 UTC
37.0 keys
31.0 keys
15 JUN 2026 · 00:32 UTC
36.6 keys
30.8 keys
23 JUN 2026 · 07:14 UTC
33.6 keys
29.2 keys
29 JUN 2026 · 01:14 UTC
34.7 keys
30.1 keys
5 JUL 2026 · 23:12 UTC
34.1 keys
29.7 keys
16 JUL 2026 · 06:43 UTC
36.2 keys
31.4 keys
29 JUL 2026 · 04:46 UTC
37.5 keys
32.6 keys
3 AUG 2026 · 00:24 UTC
38.9 keys
33.8 keys
10 AUG 2026 · 17:11 UTC
39.5 keys
34.4 keys
21 AUG 2026 · 00:09 UTC
25.7 keys
22.3 keys
23 AUG 2026 · 16:11 UTC
28.0 keys
24.3 keys
25 AUG 2026 · 04:09 UTC
34.9 keys
30.3 keys
5 SEP 2026 · 12:10 UTC
25.5 keys
22.2 keys
Price history in numbers
23 readings since 25 Sep 2025
Over the last 30 days the Purple Energy Fat Man's Field Cap's sell price ranged from 25.5 keys to 39.5 keys and is down 35.5% after 4 moves. Over a year it ranged from 25.5 keys to 39.5 keys (down 29.5%). Today's 25.5 keys sits at the bottom of its range: the lowest we have recorded is 25.5 keys (5 Sep 2026) and the highest 39.5 keys (10 Aug 2026). The price has moved 22 times since we began recording it — about once every 16 days.