Community price on backpack.tf: 25.0–38.0 keys, last changed 2025-11-17 (10mo ago). The live quote above, 22.1 keys, is 12% lower and last moved 23d 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: $69.46 — the lowest of one listing for the Kill-a-Watt effect when we looked on 2026-09-03 01:28 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 22 keys, 5.77 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 Boxcar Bomber”, with no effect in the name — the effect comes from the individual listing.
Price history
39 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 Boxcar Bomber sell price, 2025-09-25 to 2026-08-13: 39 observations, from 26.8 keys to 22.1 keys.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
26.8 keys
21.1 keys
30 SEP 2025 · 21:19 UTC
26.8 keys
21.9 keys
9 OCT 2025 · 09:01 UTC
25.6 keys
23.1 keys
19 OCT 2025 · 20:49 UTC
24.4 keys
21.9 keys
25 OCT 2025 · 17:12 UTC
23.2 keys
20.9 keys
10 NOV 2025 · 01:13 UTC
24.6 keys
22.1 keys
20 NOV 2025 · 00:43 UTC
30.2 keys
15.9 keys
23 NOV 2025 · 20:46 UTC
32.4 keys
17.1 keys
3 DEC 2025 · 08:55 UTC
32.4 keys
21.3 keys
12 DEC 2025 · 02:52 UTC
32.9 keys
17.4 keys
17 DEC 2025 · 06:49 UTC
33.5 keys
19.5 keys
22 DEC 2025 · 03:09 UTC
33.8 keys
17.8 keys
29 DEC 2025 · 00:53 UTC
32.9 keys
17.5 keys
5 JAN 2026 · 17:00 UTC
32.4 keys
18.1 keys
10 JAN 2026 · 15:39 UTC
28.7 keys
18.7 keys
22 JAN 2026 · 01:44 UTC
26.6 keys
18.9 keys
16 FEB 2026 · 10:40 UTC
26.0 keys
20.6 keys
24 FEB 2026 · 08:40 UTC
24.3 keys
19.4 keys
1 MAR 2026 · 22:42 UTC
24.0 keys
10.3 keys
8 MAR 2026 · 22:42 UTC
23.5 keys
10.4 keys
15 MAR 2026 · 22:07 UTC
23.0 keys
10.4 keys
22 MAR 2026 · 22:07 UTC
24.5 keys
13.8 keys
2 APR 2026 · 14:29 UTC
24.3 keys
15.5 keys
12 APR 2026 · 22:30 UTC
23.0 keys
18.8 keys
19 APR 2026 · 16:30 UTC
23.4 keys
19.7 keys
29 APR 2026 · 00:31 UTC
21.0 keys
17.1 keys
3 MAY 2026 · 22:31 UTC
20.1 keys
17.5 keys
10 MAY 2026 · 22:32 UTC
21.3 keys
19.1 keys
17 MAY 2026 · 22:31 UTC
21.2 keys
19.1 keys
23 MAY 2026 · 12:30 UTC
21.1 keys
19.2 keys
1 JUN 2026 · 20:30 UTC
21.4 keys
19.4 keys
8 JUN 2026 · 06:31 UTC
21.1 keys
19.1 keys
15 JUN 2026 · 18:12 UTC
21.1 keys
19.3 keys
22 JUN 2026 · 12:10 UTC
21.1 keys
19.6 keys
13 JUL 2026 · 08:44 UTC
18.8 keys
16.3 keys
19 JUL 2026 · 14:44 UTC
20.1 keys
17.4 keys
29 JUL 2026 · 00:45 UTC
21.4 keys
15.1 keys
4 AUG 2026 · 07:12 UTC
21.4 keys
18.6 keys
13 AUG 2026 · 17:12 UTC
22.1 keys
19.2 keys
Price history in numbers
39 readings since 25 Sep 2025
The price has not been re-read inside the last 30 days. Over a year it ranged from 18.8 keys to 33.8 keys (down 17.6%). Today's 22.1 keys sits in the lower third of its range: the lowest we have recorded is 18.8 keys (13 Jul 2026) and the highest 33.8 keys (22 Dec 2025). The price has moved 37 times since we began recording it — about once every 9 days.