Community price on backpack.tf: 19.0–23.0 keys, last changed 2024-04-25 (2.5y ago). The live quote above, 21.9 keys, is inside the community’s range and last moved 19d 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: $68.98 — the lowest of 2 listings for the Kill-a-Watt effect when we looked on 2026-10-13 01:35 UTC (6h 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 21 keys, 54.66 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 Détective Noir”, with no effect in the name — the effect comes from the individual listing.
Price history
123 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 Détective Noir sell price, 2025-09-25 to 2026-10-10: 123 observations, from 23.9 keys to 22.5 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
23.9 keys
16.3 keys
19 OCT 2025 · 19:56 UTC
21.8 keys
16.3 keys
18 NOV 2025 · 22:31 UTC
21.6 keys
16.1 keys
9 DEC 2025 · 16:45 UTC
23.5 keys
18.3 keys
4 JAN 2026 · 22:50 UTC
20.7 keys
13.5 keys
29 JAN 2026 · 03:43 UTC
18.1 keys
14.7 keys
15 FEB 2026 · 22:39 UTC
17.7 keys
15.2 keys
8 MAR 2026 · 22:41 UTC
18.0 keys
14.9 keys
1 APR 2026 · 00:29 UTC
17.2 keys
10.8 keys
29 APR 2026 · 00:30 UTC
16.1 keys
12.3 keys
17 MAY 2026 · 22:30 UTC
19.4 keys
14.2 keys
8 JUN 2026 · 00:30 UTC
16.1 keys
15.0 keys
8 JUL 2026 · 22:44 UTC
10.7 keys
9.33 keys
30 JUL 2026 · 00:45 UTC
12.8 keys
11.1 keys
21 AUG 2026 · 00:08 UTC
14.2 keys
12.4 keys
22 AUG 2026 · 12:08 UTC
14.2 keys
12.4 keys
24 AUG 2026 · 00:09 UTC
14.4 keys
12.6 keys
25 AUG 2026 · 12:08 UTC
14.5 keys
12.6 keys
27 AUG 2026 · 02:09 UTC
17.0 keys
14.8 keys
28 AUG 2026 · 16:09 UTC
17.3 keys
15.1 keys
30 AUG 2026 · 16:07 UTC
17.6 keys
15.3 keys
1 SEP 2026 · 04:09 UTC
17.6 keys
15.3 keys
2 SEP 2026 · 16:08 UTC
17.5 keys
15.2 keys
4 SEP 2026 · 04:08 UTC
17.8 keys
15.5 keys
5 SEP 2026 · 22:11 UTC
18.0 keys
15.6 keys
7 SEP 2026 · 10:08 UTC
18.6 keys
16.2 keys
9 SEP 2026 · 20:08 UTC
18.6 keys
16.2 keys
11 SEP 2026 · 08:08 UTC
18.8 keys
16.4 keys
13 SEP 2026 · 08:08 UTC
19.3 keys
16.8 keys
14 SEP 2026 · 20:08 UTC
19.8 keys
17.2 keys
16 SEP 2026 · 08:08 UTC
20.1 keys
17.5 keys
18 SEP 2026 · 08:08 UTC
20.7 keys
18.0 keys
19 SEP 2026 · 22:10 UTC
21.1 keys
18.3 keys
21 SEP 2026 · 12:08 UTC
21.1 keys
18.4 keys
23 SEP 2026 · 00:08 UTC
21.7 keys
18.9 keys
5 OCT 2026 · 07:09 UTC
22.0 keys
19.2 keys
7 OCT 2026 · 17:10 UTC
22.0 keys
19.1 keys
8 OCT 2026 · 01:09 UTC
22.0 keys
19.1 keys
8 OCT 2026 · 21:10 UTC
22.4 keys
19.4 keys
10 OCT 2026 · 01:09 UTC
22.5 keys
19.6 keys
Price history in numbers
123 readings since 25 Sep 2025
Over the last 30 days the Kill-a-Watt Détective Noir's sell price ranged from 19.3 keys to 22.5 keys and is up 16.4% after 34 moves. Over a year it ranged from 10.0 keys to 23.9 keys (up 3.4%). Today's 22.5 keys sits in the upper third of its range: the lowest we have recorded is 10.0 keys (1 Jul 2026) and the highest 23.9 keys (25 Sep 2025). The price has moved 122 times since we began recording it — about once every 3 days.