Community price on backpack.tf: 23.0 keys, last changed 2025-07-29 (1.2y ago). The live quote above, 20.4 keys, is 11% lower 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: $66.03 — the lowest of one listing for the Terror-Watt effect when we looked on 2026-10-06 01:30 UTC (7d 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 20 keys, 23.88 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 Harmburg”, with no effect in the name — the effect comes from the individual listing.
Price history
90 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 Harmburg sell price, 2025-09-25 to 2026-10-13: 90 observations, from 24.4 keys to 21.7 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
24.4 keys
19.9 keys
9 OCT 2025 · 08:47 UTC
23.3 keys
21.0 keys
10 NOV 2025 · 00:58 UTC
24.9 keys
22.3 keys
3 JAN 2026 · 16:49 UTC
23.6 keys
18.1 keys
18 JAN 2026 · 23:24 UTC
20.2 keys
15.6 keys
5 MAR 2026 · 22:42 UTC
19.8 keys
16.0 keys
3 APR 2026 · 06:30 UTC
21.2 keys
17.4 keys
19 APR 2026 · 22:30 UTC
21.3 keys
17.7 keys
13 MAY 2026 · 14:33 UTC
20.7 keys
17.8 keys
1 JUN 2026 · 02:29 UTC
20.8 keys
18.1 keys
15 JUN 2026 · 02:30 UTC
20.3 keys
17.9 keys
29 JUN 2026 · 03:14 UTC
22.3 keys
19.4 keys
12 JUL 2026 · 12:45 UTC
21.3 keys
18.5 keys
6 AUG 2026 · 11:13 UTC
24.2 keys
21.0 keys
20 AUG 2026 · 14:08 UTC
11.1 keys
9.63 keys
24 AUG 2026 · 02:09 UTC
11.1 keys
9.65 keys
25 AUG 2026 · 16:09 UTC
11.2 keys
9.78 keys
26 AUG 2026 · 22:09 UTC
13.7 keys
12.0 keys
28 AUG 2026 · 00:09 UTC
13.8 keys
12.0 keys
29 AUG 2026 · 00:09 UTC
13.8 keys
12.0 keys
31 AUG 2026 · 14:09 UTC
20.3 keys
17.6 keys
1 SEP 2026 · 14:08 UTC
20.0 keys
17.4 keys
4 SEP 2026 · 00:08 UTC
20.0 keys
17.3 keys
5 SEP 2026 · 02:08 UTC
20.4 keys
17.8 keys
7 SEP 2026 · 10:08 UTC
20.1 keys
17.5 keys
8 SEP 2026 · 10:08 UTC
19.9 keys
17.3 keys
9 SEP 2026 · 18:08 UTC
19.9 keys
17.3 keys
13 SEP 2026 · 18:08 UTC
19.9 keys
17.3 keys
19 SEP 2026 · 08:08 UTC
20.3 keys
17.7 keys
28 SEP 2026 · 22:08 UTC
20.7 keys
18.0 keys
29 SEP 2026 · 22:08 UTC
20.4 keys
17.8 keys
1 OCT 2026 · 10:08 UTC
20.4 keys
17.7 keys
2 OCT 2026 · 11:10 UTC
20.4 keys
17.7 keys
3 OCT 2026 · 11:09 UTC
20.7 keys
18.0 keys
5 OCT 2026 · 03:09 UTC
21.1 keys
18.4 keys
6 OCT 2026 · 03:09 UTC
21.1 keys
18.3 keys
7 OCT 2026 · 03:09 UTC
21.6 keys
18.8 keys
8 OCT 2026 · 03:10 UTC
21.6 keys
18.8 keys
9 OCT 2026 · 23:10 UTC
21.9 keys
19.0 keys
13 OCT 2026 · 01:08 UTC
21.7 keys
18.8 keys
Price history in numbers
90 readings since 25 Sep 2025
Over the last 30 days the Terror-Watt Harmburg's sell price ranged from 19.7 keys to 21.9 keys and is up 8.7% after 28 moves. Over a year it ranged from 11.0 keys to 24.9 keys (down 2.3%). Today's 21.7 keys sits in the upper third of its range: the lowest we have recorded is 11.0 keys (24 Aug 2026) and the highest 24.9 keys (10 Nov 2025). The price has moved 89 times since we began recording it — about once every 4 days.