Community price on backpack.tf: 11.0–12.0 keys, last changed 2020-07-17 (6.2y ago). The live quote above, 22.4 keys, is 104% higher and last moved 16d 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: $68.00 — the lowest of 3 listings for the Kill-a-Watt effect when we looked on 2026-10-13 01:37 UTC (5h 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, 26.66 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 Defiant Spartan”, with no effect in the name — the effect comes from the individual listing.
Price history
70 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 Defiant Spartan sell price, 2025-09-25 to 2026-10-11: 70 observations, from 12.2 keys to 22.9 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
12.2 keys
9.89 keys
5 OCT 2025 · 20:51 UTC
12.6 keys
9.43 keys
19 OCT 2025 · 22:46 UTC
23.2 keys
22.8 keys
26 OCT 2025 · 02:01 UTC
23.4 keys
23.1 keys
26 NOV 2025 · 06:47 UTC
25.4 keys
22.8 keys
22 DEC 2025 · 17:05 UTC
26.5 keys
10.4 keys
4 JAN 2026 · 14:45 UTC
21.5 keys
10.2 keys
11 JAN 2026 · 01:34 UTC
19.8 keys
10.0 keys
29 JAN 2026 · 01:43 UTC
23.4 keys
12.9 keys
8 FEB 2026 · 22:41 UTC
17.6 keys
13.0 keys
24 FEB 2026 · 14:41 UTC
15.5 keys
13.1 keys
2 MAR 2026 · 04:39 UTC
15.0 keys
13.0 keys
16 MAR 2026 · 00:06 UTC
14.5 keys
12.2 keys
3 APR 2026 · 12:30 UTC
15.4 keys
13.0 keys
18 APR 2026 · 18:30 UTC
15.3 keys
13.1 keys
3 MAY 2026 · 22:30 UTC
14.3 keys
12.3 keys
10 MAY 2026 · 12:30 UTC
15.2 keys
13.8 keys
24 MAY 2026 · 18:29 UTC
26.8 keys
14.3 keys
8 JUN 2026 · 04:30 UTC
23.6 keys
15.9 keys
22 JUN 2026 · 08:10 UTC
24.2 keys
14.8 keys
30 JUN 2026 · 23:13 UTC
19.6 keys
17.0 keys
16 JUL 2026 · 00:44 UTC
21.7 keys
18.9 keys
10 AUG 2026 · 05:10 UTC
22.7 keys
19.7 keys
21 AUG 2026 · 18:09 UTC
22.6 keys
19.7 keys
22 AUG 2026 · 18:09 UTC
22.7 keys
19.7 keys
23 AUG 2026 · 18:08 UTC
22.7 keys
19.8 keys
24 AUG 2026 · 18:09 UTC
22.6 keys
19.7 keys
25 AUG 2026 · 20:09 UTC
22.7 keys
19.8 keys
26 AUG 2026 · 20:09 UTC
22.7 keys
19.8 keys
27 AUG 2026 · 08:08 UTC
22.8 keys
19.8 keys
28 AUG 2026 · 11:22 UTC
22.8 keys
19.8 keys
1 SEP 2026 · 18:08 UTC
22.4 keys
19.5 keys
7 SEP 2026 · 18:08 UTC
22.4 keys
19.5 keys
9 SEP 2026 · 06:09 UTC
22.0 keys
19.1 keys
12 SEP 2026 · 08:09 UTC
22.2 keys
19.3 keys
15 SEP 2026 · 20:09 UTC
22.4 keys
19.5 keys
21 SEP 2026 · 20:09 UTC
22.6 keys
19.6 keys
25 SEP 2026 · 22:09 UTC
22.8 keys
19.8 keys
3 OCT 2026 · 09:09 UTC
22.5 keys
19.6 keys
11 OCT 2026 · 01:10 UTC
22.9 keys
19.9 keys
Price history in numbers
70 readings since 25 Sep 2025
Over the last 30 days the Kill-a-Watt Defiant Spartan's sell price ranged from 22.2 keys to 22.9 keys and is up 3.1% after 8 moves. Over a year it ranged from 14.3 keys to 27.6 keys (down 1.2%). Today's 22.9 keys sits in the upper third of its range: the lowest we have recorded is 12.2 keys (30 Sep 2025) and the highest 27.6 keys (15 Dec 2025). The price has moved 69 times since we began recording it — about once every 6 days.