Community price on backpack.tf: 13.0 keys, last changed 2018-04-02 (8.5y ago). The live quote above, 19.2 keys, is 48% higher and last moved 11d 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: $89.54 — the lowest of one listing for the Kill-a-Watt effect when we looked on 2026-10-10 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 19 keys, 15.22 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 One-Man Army”, with no effect in the name — the effect comes from the individual listing.
Price history
107 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 One-Man Army sell price, 2025-09-25 to 2026-10-10: 107 observations, from 13.2 keys to 20.0 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
13.2 keys
10.8 keys
19 OCT 2025 · 20:03 UTC
12.9 keys
11.6 keys
10 NOV 2025 · 00:24 UTC
12.6 keys
11.4 keys
5 JUL 2026 · 21:12 UTC
8.65 keys
7.52 keys
29 JUL 2026 · 00:45 UTC
18.3 keys
15.9 keys
20 AUG 2026 · 22:08 UTC
13.4 keys
11.6 keys
22 AUG 2026 · 22:08 UTC
13.4 keys
11.6 keys
24 AUG 2026 · 12:09 UTC
14.9 keys
13.0 keys
26 AUG 2026 · 00:08 UTC
16.6 keys
14.5 keys
27 AUG 2026 · 00:09 UTC
16.8 keys
14.6 keys
28 AUG 2026 · 12:07 UTC
17.0 keys
14.7 keys
30 AUG 2026 · 00:09 UTC
17.2 keys
14.9 keys
31 AUG 2026 · 16:09 UTC
17.5 keys
15.2 keys
1 SEP 2026 · 16:08 UTC
17.4 keys
15.2 keys
3 SEP 2026 · 06:08 UTC
17.3 keys
15.0 keys
5 SEP 2026 · 00:08 UTC
17.3 keys
15.1 keys
6 SEP 2026 · 10:08 UTC
18.0 keys
15.7 keys
7 SEP 2026 · 22:08 UTC
17.7 keys
15.4 keys
10 SEP 2026 · 20:09 UTC
17.7 keys
15.4 keys
12 SEP 2026 · 08:09 UTC
17.8 keys
15.5 keys
13 SEP 2026 · 08:08 UTC
17.9 keys
15.5 keys
14 SEP 2026 · 20:08 UTC
18.1 keys
15.8 keys
16 SEP 2026 · 08:08 UTC
18.2 keys
15.8 keys
18 SEP 2026 · 08:08 UTC
18.3 keys
15.9 keys
19 SEP 2026 · 08:08 UTC
18.6 keys
16.2 keys
20 SEP 2026 · 22:11 UTC
18.7 keys
16.3 keys
22 SEP 2026 · 10:08 UTC
18.9 keys
16.4 keys
23 SEP 2026 · 10:07 UTC
18.9 keys
16.4 keys
24 SEP 2026 · 22:08 UTC
19.1 keys
16.6 keys
26 SEP 2026 · 10:08 UTC
19.2 keys
16.7 keys
28 SEP 2026 · 00:08 UTC
19.5 keys
17.0 keys
29 SEP 2026 · 00:08 UTC
19.4 keys
16.8 keys
30 SEP 2026 · 12:08 UTC
19.3 keys
16.8 keys
2 OCT 2026 · 00:08 UTC
19.2 keys
16.7 keys
3 OCT 2026 · 17:09 UTC
19.7 keys
17.1 keys
5 OCT 2026 · 07:09 UTC
19.8 keys
17.2 keys
6 OCT 2026 · 19:09 UTC
19.8 keys
17.2 keys
8 OCT 2026 · 07:09 UTC
20.0 keys
17.4 keys
9 OCT 2026 · 07:09 UTC
19.9 keys
17.3 keys
10 OCT 2026 · 19:09 UTC
20.0 keys
17.4 keys
Price history in numbers
107 readings since 25 Sep 2025
Over the last 30 days the Kill-a-Watt One-Man Army's sell price ranged from 17.9 keys to 20.0 keys and is up 11.9% after 51 moves. Over a year it ranged from 8.65 keys to 20.0 keys (up 54.5%). Today's 20.0 keys sits at the top of its range: the lowest we have recorded is 8.65 keys (5 Jul 2026) and the highest 20.0 keys (9 Oct 2026). The price has moved 105 times since we began recording it — about once every 4 days.