Community price on backpack.tf: 17.0 keys, last changed 2025-07-26 (1.1y ago). The live quote above, 16.4 keys, is 4% lower and last moved 4h 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: $60.02 — the lowest of one listing for the Kill-a-Watt effect when we looked on 2026-09-03 01:27 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 16 keys, 23.55 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 Impact Impaler”, with no effect in the name — the effect comes from the individual listing.
Price history
41 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 Impact Impaler sell price, 2025-09-25 to 2026-09-05: 41 observations, from 17.2 keys to 16.4 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
17.2 keys
14.1 keys
30 SEP 2025 · 23:00 UTC
17.2 keys
14.1 keys
9 OCT 2025 · 10:31 UTC
16.5 keys
14.8 keys
19 OCT 2025 · 22:29 UTC
15.7 keys
14.1 keys
25 OCT 2025 · 18:41 UTC
14.9 keys
13.4 keys
10 NOV 2025 · 02:35 UTC
15.3 keys
13.8 keys
22 JUN 2026 · 17:13 UTC
13.2 keys
11.5 keys
29 JUN 2026 · 01:14 UTC
12.8 keys
11.1 keys
5 JUL 2026 · 23:12 UTC
12.8 keys
11.1 keys
11 JUL 2026 · 00:44 UTC
12.9 keys
11.2 keys
19 JUL 2026 · 22:44 UTC
13.7 keys
11.9 keys
29 JUL 2026 · 02:45 UTC
14.7 keys
12.8 keys
3 AUG 2026 · 02:24 UTC
15.3 keys
13.3 keys
10 AUG 2026 · 01:11 UTC
16.0 keys
13.9 keys
21 AUG 2026 · 00:09 UTC
11.4 keys
9.89 keys
22 AUG 2026 · 02:09 UTC
14.9 keys
12.9 keys
23 AUG 2026 · 06:09 UTC
15.0 keys
13.0 keys
23 AUG 2026 · 20:10 UTC
15.0 keys
13.0 keys
24 AUG 2026 · 10:09 UTC
15.0 keys
13.1 keys
24 AUG 2026 · 22:09 UTC
15.1 keys
13.1 keys
26 AUG 2026 · 00:09 UTC
15.2 keys
13.2 keys
26 AUG 2026 · 22:10 UTC
15.3 keys
13.3 keys
27 AUG 2026 · 22:09 UTC
15.3 keys
13.3 keys
28 AUG 2026 · 11:23 UTC
15.6 keys
13.6 keys
29 AUG 2026 · 04:09 UTC
15.7 keys
13.6 keys
29 AUG 2026 · 16:09 UTC
15.7 keys
13.7 keys
30 AUG 2026 · 04:10 UTC
15.8 keys
13.7 keys
30 AUG 2026 · 16:08 UTC
15.8 keys
13.8 keys
31 AUG 2026 · 04:10 UTC
15.8 keys
13.7 keys
31 AUG 2026 · 16:09 UTC
15.8 keys
13.7 keys
1 SEP 2026 · 04:10 UTC
15.8 keys
13.7 keys
1 SEP 2026 · 16:09 UTC
15.8 keys
13.8 keys
2 SEP 2026 · 04:09 UTC
15.6 keys
13.6 keys
2 SEP 2026 · 16:09 UTC
15.8 keys
13.7 keys
3 SEP 2026 · 04:08 UTC
15.9 keys
13.8 keys
3 SEP 2026 · 16:08 UTC
16.5 keys
14.3 keys
4 SEP 2026 · 04:09 UTC
16.1 keys
14.0 keys
4 SEP 2026 · 16:09 UTC
16.0 keys
13.9 keys
5 SEP 2026 · 04:09 UTC
16.7 keys
14.5 keys
5 SEP 2026 · 16:08 UTC
16.4 keys
14.2 keys
Price history in numbers
41 readings since 25 Sep 2025
Over the last 30 days the Kill-a-Watt Impact Impaler's sell price ranged from 11.4 keys to 16.7 keys and is up 2.3% after 26 moves. Over a year it ranged from 11.4 keys to 17.2 keys (down 4.7%). Today's 16.4 keys sits in the upper third of its range: the lowest we have recorded is 11.4 keys (21 Aug 2026) and the highest 17.2 keys (30 Sep 2025). The price has moved 39 times since we began recording it — about once every 9 days.