Community price on backpack.tf: 225 keys, last changed 2025-03-25 (1.6y ago). The live quote above, 175 keys, is 22% lower and last moved 12d 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: $1038.88 — the lowest of one listing for the Sulphurous effect when we looked on 2026-10-13 01:40 UTC (8h 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 174 keys, 52 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 Tyrantium Helmet”, with no effect in the name — the effect comes from the individual listing.
Price history
60 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 Tyrantium Helmet sell price, 2025-09-25 to 2026-10-06: 60 observations, from 233 keys to 183 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
233 keys
191 keys
9 OCT 2025 · 08:28 UTC
223 keys
200 keys
19 OCT 2025 · 20:15 UTC
212 keys
190 keys
10 NOV 2025 · 00:36 UTC
207 keys
186 keys
23 JUN 2026 · 05:13 UTC
92.0 keys
80.0 keys
5 JUL 2026 · 23:12 UTC
144 keys
126 keys
12 JUL 2026 · 22:44 UTC
145 keys
126 keys
29 JUL 2026 · 00:45 UTC
107 keys
93.0 keys
3 AUG 2026 · 00:24 UTC
162 keys
141 keys
18 AUG 2026 · 07:10 UTC
168 keys
146 keys
29 AUG 2026 · 18:10 UTC
161 keys
140 keys
31 AUG 2026 · 02:09 UTC
160 keys
139 keys
2 SEP 2026 · 18:09 UTC
128 keys
111 keys
5 SEP 2026 · 20:08 UTC
156 keys
136 keys
6 SEP 2026 · 10:08 UTC
162 keys
141 keys
11 SEP 2026 · 10:08 UTC
131 keys
114 keys
12 SEP 2026 · 06:08 UTC
134 keys
116 keys
13 SEP 2026 · 06:08 UTC
173 keys
151 keys
13 SEP 2026 · 18:08 UTC
174 keys
151 keys
14 SEP 2026 · 18:08 UTC
177 keys
154 keys
15 SEP 2026 · 06:08 UTC
176 keys
153 keys
16 SEP 2026 · 10:08 UTC
176 keys
153 keys
16 SEP 2026 · 22:08 UTC
178 keys
155 keys
18 SEP 2026 · 04:07 UTC
177 keys
154 keys
20 SEP 2026 · 22:11 UTC
178 keys
155 keys
21 SEP 2026 · 22:09 UTC
179 keys
156 keys
22 SEP 2026 · 10:08 UTC
179 keys
156 keys
23 SEP 2026 · 18:10 UTC
178 keys
155 keys
25 SEP 2026 · 16:08 UTC
180 keys
156 keys
26 SEP 2026 · 08:08 UTC
180 keys
157 keys
26 SEP 2026 · 10:08 UTC
180 keys
157 keys
26 SEP 2026 · 18:08 UTC
181 keys
157 keys
27 SEP 2026 · 00:08 UTC
177 keys
154 keys
27 SEP 2026 · 22:07 UTC
182 keys
158 keys
28 SEP 2026 · 10:08 UTC
179 keys
156 keys
29 SEP 2026 · 12:08 UTC
180 keys
157 keys
30 SEP 2026 · 00:08 UTC
179 keys
155 keys
1 OCT 2026 · 02:08 UTC
179 keys
156 keys
1 OCT 2026 · 16:08 UTC
175 keys
152 keys
6 OCT 2026 · 09:10 UTC
183 keys
159 keys
Price history in numbers
60 readings since 25 Sep 2025
Over the last 30 days the Sulphurous Tyrantium Helmet's sell price ranged from 174 keys to 183 keys and is up 5.2% after 32 moves. Over a year it ranged from 92.0 keys to 212 keys (down 13.7%). Today's 183 keys sits in the middle of its range: the lowest we have recorded is 92.0 keys (23 Jun 2026) and the highest 233 keys (25 Sep 2025). The price has moved 59 times since we began recording it — about once every 6 days.