This price has not changed since 2026-07-17 10:44 UTC. It reflects the last observed trade rather than current market value, and this page is excluded from our sitemap for that reason.
Community price on backpack.tf: 150 keys, last changed 2026-10-12 (20h ago). The live quote above, 40.5 keys, is 73% lower and last moved 3mo 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: $769.76 — the lowest of one listing for the Kill-a-Watt effect when we looked on 2026-10-13 01:43 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 40 keys, 33 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 Das Hazmattenhatten”, with no effect in the name — the effect comes from the individual listing.
Price history
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.
| Observed (UTC) | Sell | Buy |
|---|---|---|
| 25 SEP 2025 · 03:29 UTC | 38.7 keys | 31.8 keys |
| 30 SEP 2025 · 20:53 UTC | 38.7 keys | 31.7 keys |
| 9 OCT 2025 · 08:35 UTC | 37.0 keys | 33.3 keys |
| 19 OCT 2025 · 20:22 UTC | 35.2 keys | 31.7 keys |
| 25 OCT 2025 · 16:43 UTC | 33.5 keys | 30.2 keys |
| 10 NOV 2025 · 00:44 UTC | 34.4 keys | 31.0 keys |
| 22 JUN 2026 · 17:13 UTC | 35.1 keys | 30.5 keys |
| 29 JUN 2026 · 01:14 UTC | 36.6 keys | 31.8 keys |
| 5 JUL 2026 · 23:12 UTC | 35.0 keys | 30.5 keys |
| 17 JUL 2026 · 10:44 UTC | 40.5 keys | 35.3 keys |
Price history in numbers
10 readings since 25 Sep 2025The price has not been re-read inside the last 30 days. Over a year it ranged from 33.5 keys to 40.5 keys (up 15.0%). Today's 40.5 keys sits at the top of its range: the lowest we have recorded is 33.5 keys (25 Oct 2025) and the highest 40.5 keys (17 Jul 2026). The price has moved 9 times since we began recording it — about once every 33 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| a year | 33.5 keys | 40.5 keys | +15.0% | 6 | 7 |
Details
| SKU | 30095;5;u56 |
|---|---|
| Last price change | 2026-07-17 10:44 UTC |
| Key rate when recorded | 64.33 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 1,111 keys | 11mo ago | |
| 1,100 keys | 11mo ago | |
| 1,100 keys | 11mo ago | |
| 760 keys | 20d ago | |
| 387 keys | 11d ago | |
| 303 keys | 14d ago | |
| 283 keys | 12d ago | |
| 283 keys | 12d ago | |
| 261 keys | 18d ago | |
| 265 keys | 11d ago |
Other effects on the Das Hazmattenhatten
same item, different effect| Item | Value | Updated |
|---|---|---|
| 255 keys | 2mo ago | |
| 230 keys | 2mo ago | |
| 190 keys | 2mo ago | |
| 183 keys | 12d ago | |
| 152 keys | 20d ago | |
| 149 keys | 2mo ago | |
| 145 keys | 2mo ago | |
| 143 keys | 16d ago | |
| 128 keys | 2mo ago | |
| 127 keys | 2mo ago |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
| 41.2 keys | 12d ago | |
| 41.1 keys | 13d ago | |
| 41.2 keys | 12d ago | |
| 42.2 keys | 12d ago | |
| 41.4 keys | 11d ago | |
| 40.5 keys | 2mo ago | |
| 41.5 keys | 11d ago | |
| 41.2 keys | 12d ago |