Community price on backpack.tf: 22.0–26.0 keys, last changed 2017-02-09 (9.6y ago). The live quote above, 86.9 keys, is 295% higher and last moved 4h 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
40 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.
Phosphorous Firewall Helmet sell price, 2025-09-25 to 2026-09-05: 40 observations, from 26.8 keys to 86.9 keys.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
26.8 keys
19.4 keys
30 SEP 2025 · 20:48 UTC
27.9 keys
18.6 keys
9 OCT 2025 · 08:31 UTC
26.7 keys
19.5 keys
19 OCT 2025 · 20:18 UTC
25.4 keys
18.6 keys
25 OCT 2025 · 16:39 UTC
24.1 keys
17.7 keys
10 NOV 2025 · 00:40 UTC
26.2 keys
19.1 keys
28 JUL 2026 · 20:45 UTC
40.6 keys
35.3 keys
1 AUG 2026 · 12:43 UTC
37.4 keys
32.5 keys
9 AUG 2026 · 17:11 UTC
42.2 keys
36.8 keys
21 AUG 2026 · 06:08 UTC
76.3 keys
66.4 keys
21 AUG 2026 · 18:09 UTC
78.7 keys
68.4 keys
22 AUG 2026 · 08:08 UTC
83.6 keys
72.7 keys
22 AUG 2026 · 20:08 UTC
84.0 keys
73.0 keys
23 AUG 2026 · 08:08 UTC
84.5 keys
73.4 keys
23 AUG 2026 · 20:09 UTC
84.9 keys
73.8 keys
24 AUG 2026 · 08:08 UTC
84.8 keys
73.8 keys
24 AUG 2026 · 20:09 UTC
86.1 keys
74.8 keys
25 AUG 2026 · 08:09 UTC
86.6 keys
75.3 keys
25 AUG 2026 · 20:09 UTC
87.3 keys
75.9 keys
26 AUG 2026 · 08:08 UTC
88.2 keys
76.7 keys
26 AUG 2026 · 22:09 UTC
88.6 keys
77.1 keys
27 AUG 2026 · 10:08 UTC
89.2 keys
77.6 keys
27 AUG 2026 · 22:09 UTC
89.4 keys
77.7 keys
28 AUG 2026 · 12:07 UTC
89.7 keys
78.0 keys
29 AUG 2026 · 00:09 UTC
89.8 keys
78.1 keys
29 AUG 2026 · 12:09 UTC
89.5 keys
77.8 keys
30 AUG 2026 · 00:09 UTC
89.9 keys
78.2 keys
30 AUG 2026 · 12:08 UTC
91.8 keys
79.8 keys
31 AUG 2026 · 00:08 UTC
89.8 keys
78.1 keys
31 AUG 2026 · 12:09 UTC
89.8 keys
78.1 keys
1 SEP 2026 · 00:09 UTC
88.9 keys
77.3 keys
1 SEP 2026 · 12:08 UTC
88.3 keys
76.8 keys
2 SEP 2026 · 00:08 UTC
86.9 keys
75.6 keys
2 SEP 2026 · 12:08 UTC
87.1 keys
75.7 keys
3 SEP 2026 · 00:08 UTC
87.8 keys
76.4 keys
3 SEP 2026 · 12:09 UTC
87.4 keys
76.0 keys
4 SEP 2026 · 00:08 UTC
88.2 keys
76.7 keys
4 SEP 2026 · 12:08 UTC
87.5 keys
76.1 keys
5 SEP 2026 · 00:08 UTC
87.2 keys
75.8 keys
5 SEP 2026 · 12:10 UTC
86.9 keys
75.6 keys
Price history in numbers
40 readings since 25 Sep 2025
Over the last 30 days the Phosphorous Firewall Helmet's sell price ranged from 42.2 keys to 91.8 keys and is up 105.7% after 31 moves. Over a year it ranged from 24.1 keys to 91.8 keys (up 223.6%). Today's 86.9 keys sits in the upper third of its range: the lowest we have recorded is 24.1 keys (25 Oct 2025) and the highest 91.8 keys (30 Aug 2026). The price has moved 39 times since we began recording it — about once every 9 days.