Community price on backpack.tf: 275 keys, last changed 2026-02-05 (8mo ago). The live quote above, 196 keys, is 29% lower and last moved 21d 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.
Price history
22 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.
Sulphurous Engineer's Cap sell price, 2025-09-25 to 2026-10-11: 22 observations, from 39.1 keys to 205 keys.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
39.1 keys
32.1 keys
30 SEP 2025 · 20:09 UTC
39.1 keys
32.0 keys
9 OCT 2025 · 07:54 UTC
37.4 keys
33.7 keys
19 OCT 2025 · 19:39 UTC
35.6 keys
32.0 keys
25 OCT 2025 · 15:57 UTC
33.9 keys
30.5 keys
9 NOV 2025 · 23:57 UTC
35.9 keys
32.3 keys
17 NOV 2025 · 04:31 UTC
12.9 keys
12.9 keys
28 JUL 2026 · 06:44 UTC
11.6 keys
10.2 keys
19 AUG 2026 · 08:32 UTC
165 keys
143 keys
23 AUG 2026 · 14:08 UTC
170 keys
148 keys
24 AUG 2026 · 02:09 UTC
179 keys
156 keys
5 SEP 2026 · 14:08 UTC
187 keys
163 keys
6 SEP 2026 · 10:08 UTC
200 keys
174 keys
9 SEP 2026 · 20:08 UTC
195 keys
170 keys
10 SEP 2026 · 14:07 UTC
199 keys
173 keys
11 SEP 2026 · 02:08 UTC
204 keys
177 keys
22 SEP 2026 · 06:09 UTC
196 keys
171 keys
6 OCT 2026 · 07:08 UTC
200 keys
174 keys
6 OCT 2026 · 19:08 UTC
211 keys
183 keys
7 OCT 2026 · 11:09 UTC
205 keys
178 keys
8 OCT 2026 · 07:09 UTC
213 keys
185 keys
11 OCT 2026 · 03:08 UTC
205 keys
178 keys
Price history in numbers
22 readings since 25 Sep 2025
Over the last 30 days the Sulphurous Engineer's Cap's sell price ranged from 196 keys to 213 keys and is up 4.6% after 5 moves. Over a year it ranged from 11.6 keys to 213 keys (up 476.4%). Today's 205 keys sits at the top of its range: the lowest we have recorded is 11.6 keys (28 Jul 2026) and the highest 213 keys (8 Oct 2026). The price has moved 21 times since we began recording it — about once every 18 days.