Community price on backpack.tf: 21.0 keys, last changed 2020-07-10 (6.2y ago). The live quote above, 40.5 keys, is 93% higher and last moved 3h 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: $115.86 — the lowest of one listing for the Kill-a-Watt effect when we looked on 2026-09-02 01:25 UTC (4d 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 40 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 Grimm Hatte”, with no effect in the name — the effect comes from the individual listing.
Price history
49 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.
Kill-a-Watt Grimm Hatte sell price, 2025-09-25 to 2026-09-05: 49 observations, from 22.3 keys to 40.5 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
22.3 keys
18.2 keys
30 SEP 2025 · 20:29 UTC
22.3 keys
18.2 keys
9 OCT 2025 · 08:12 UTC
21.3 keys
19.1 keys
25 OCT 2025 · 16:17 UTC
19.3 keys
17.4 keys
10 NOV 2025 · 00:18 UTC
22.0 keys
19.7 keys
3 DEC 2025 · 12:50 UTC
53.9 keys
17.9 keys
17 DEC 2025 · 02:44 UTC
54.8 keys
18.2 keys
2 JAN 2026 · 06:46 UTC
46.9 keys
17.4 keys
22 JAN 2026 · 03:43 UTC
46.9 keys
27.6 keys
1 FEB 2026 · 23:43 UTC
43.6 keys
26.0 keys
19 FEB 2026 · 06:40 UTC
46.0 keys
28.3 keys
5 MAR 2026 · 20:41 UTC
42.8 keys
26.8 keys
8 MAR 2026 · 22:41 UTC
42.3 keys
26.6 keys
15 MAR 2026 · 22:07 UTC
41.8 keys
26.5 keys
22 MAR 2026 · 20:07 UTC
45.0 keys
28.7 keys
2 APR 2026 · 20:30 UTC
45.6 keys
29.6 keys
16 APR 2026 · 22:29 UTC
45.8 keys
29.8 keys
29 APR 2026 · 00:30 UTC
42.7 keys
28.0 keys
9 MAY 2026 · 12:31 UTC
44.9 keys
30.4 keys
17 MAY 2026 · 22:30 UTC
44.7 keys
30.4 keys
1 JUN 2026 · 02:29 UTC
45.1 keys
31.3 keys
8 JUN 2026 · 00:30 UTC
44.1 keys
30.8 keys
22 JUN 2026 · 17:13 UTC
37.1 keys
32.2 keys
29 JUN 2026 · 01:14 UTC
38.6 keys
33.5 keys
10 JUL 2026 · 16:45 UTC
36.9 keys
32.1 keys
19 JUL 2026 · 22:44 UTC
38.8 keys
33.7 keys
29 JUL 2026 · 00:45 UTC
41.7 keys
36.2 keys
3 AUG 2026 · 00:24 UTC
43.3 keys
37.7 keys
14 AUG 2026 · 01:12 UTC
43.8 keys
38.1 keys
25 AUG 2026 · 04:09 UTC
31.8 keys
27.6 keys
31 AUG 2026 · 04:09 UTC
37.9 keys
33.0 keys
31 AUG 2026 · 16:09 UTC
38.1 keys
33.2 keys
1 SEP 2026 · 04:09 UTC
38.5 keys
33.5 keys
2 SEP 2026 · 04:08 UTC
38.0 keys
33.0 keys
2 SEP 2026 · 16:08 UTC
38.7 keys
33.7 keys
3 SEP 2026 · 04:08 UTC
39.0 keys
33.9 keys
3 SEP 2026 · 16:08 UTC
40.5 keys
35.2 keys
4 SEP 2026 · 16:08 UTC
39.6 keys
34.4 keys
5 SEP 2026 · 04:08 UTC
41.3 keys
35.9 keys
5 SEP 2026 · 16:08 UTC
40.5 keys
35.2 keys
Price history in numbers
49 readings since 25 Sep 2025
Over the last 30 days the Kill-a-Watt Grimm Hatte's sell price ranged from 31.8 keys to 43.8 keys and is down 7.6% after 14 moves. Over a year it ranged from 19.3 keys to 54.8 keys (up 81.5%). Today's 40.5 keys sits in the middle of its range: the lowest we have recorded is 19.3 keys (25 Oct 2025) and the highest 54.8 keys (17 Dec 2025). The price has moved 46 times since we began recording it — about once every 8 days.