Community price on backpack.tf: 43.0 keys, last changed 2024-01-02 (2.7y ago). The live quote above, 43.6 keys, is 2% higher and last moved 6h 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: $135.45 — the lowest of one listing for the Terror-Watt effect when we looked on 2026-09-02 01:30 UTC (4d 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 43 keys, 40.22 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 Killer Exclusive”, with no effect in the name — the effect comes from the individual listing.
Price history
76 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.
Terror-Watt Killer Exclusive sell price, 2025-09-25 to 2026-09-05: 76 observations, from 44.5 keys to 43.6 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
44.5 keys
36.3 keys
9 OCT 2025 · 07:52 UTC
42.0 keys
37.8 keys
29 OCT 2025 · 16:01 UTC
48.5 keys
41.6 keys
9 NOV 2025 · 13:59 UTC
52.0 keys
43.9 keys
23 NOV 2025 · 22:33 UTC
56.0 keys
48.5 keys
8 DEC 2025 · 06:42 UTC
59.0 keys
49.9 keys
22 DEC 2025 · 01:04 UTC
58.6 keys
51.8 keys
29 DEC 2025 · 14:50 UTC
57.1 keys
48.0 keys
11 JAN 2026 · 15:32 UTC
48.6 keys
38.6 keys
29 JAN 2026 · 23:42 UTC
47.5 keys
43.4 keys
8 FEB 2026 · 22:41 UTC
46.3 keys
35.0 keys
23 FEB 2026 · 12:39 UTC
44.3 keys
35.3 keys
8 MAR 2026 · 22:40 UTC
42.4 keys
35.0 keys
24 MAR 2026 · 14:05 UTC
41.3 keys
26.8 keys
12 APR 2026 · 22:29 UTC
48.5 keys
26.2 keys
29 APR 2026 · 00:29 UTC
41.8 keys
31.6 keys
10 MAY 2026 · 20:30 UTC
40.6 keys
34.5 keys
24 MAY 2026 · 22:29 UTC
39.5 keys
35.1 keys
8 JUN 2026 · 00:30 UTC
38.0 keys
35.8 keys
22 JUN 2026 · 17:13 UTC
38.2 keys
37.5 keys
1 JUL 2026 · 15:13 UTC
38.1 keys
36.8 keys
19 JUL 2026 · 22:44 UTC
42.7 keys
29.7 keys
3 AUG 2026 · 00:24 UTC
41.9 keys
36.4 keys
21 AUG 2026 · 10:08 UTC
43.8 keys
38.1 keys
21 AUG 2026 · 14:08 UTC
43.8 keys
38.1 keys
21 AUG 2026 · 22:08 UTC
43.7 keys
38.0 keys
22 AUG 2026 · 12:08 UTC
43.7 keys
38.0 keys
23 AUG 2026 · 12:08 UTC
43.8 keys
38.1 keys
24 AUG 2026 · 12:08 UTC
43.8 keys
38.1 keys
25 AUG 2026 · 12:08 UTC
43.9 keys
38.2 keys
26 AUG 2026 · 12:08 UTC
44.3 keys
38.5 keys
27 AUG 2026 · 12:08 UTC
44.3 keys
38.5 keys
28 AUG 2026 · 14:10 UTC
44.5 keys
38.7 keys
29 AUG 2026 · 02:08 UTC
44.6 keys
38.7 keys
30 AUG 2026 · 02:09 UTC
44.7 keys
38.9 keys
31 AUG 2026 · 02:09 UTC
44.4 keys
38.6 keys
1 SEP 2026 · 02:08 UTC
44.4 keys
38.6 keys
2 SEP 2026 · 02:08 UTC
43.6 keys
37.9 keys
3 SEP 2026 · 04:08 UTC
44.0 keys
38.3 keys
5 SEP 2026 · 12:09 UTC
43.6 keys
38.0 keys
Price history in numbers
76 readings since 25 Sep 2025
Over the last 30 days the Terror-Watt Killer Exclusive's sell price ranged from 42.8 keys to 44.8 keys and is up 2.0% after 32 moves. Over a year it ranged from 20.8 keys to 59.0 keys (down 1.8%). Today's 43.6 keys sits in the middle of its range: the lowest we have recorded is 20.8 keys (2 Nov 2025) and the highest 59.0 keys (8 Dec 2025). The price has moved 75 times since we began recording it — about once every 5 days.