Community price on backpack.tf: 150 keys, last changed 2023-06-11 (3.2y ago). The live quote above, 114 keys, is 24% lower 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.
Steam Market asking price: $336.39 — the lowest of one listing for the Bubbling effect when we looked on 2026-08-31 01:30 UTC (6d 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 114 keys, 25.11 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 Soldered Sensei”, with no effect in the name — the effect comes from the individual listing.
Price history
20 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.
Bubbling Soldered Sensei sell price, 2025-09-25 to 2026-09-05: 20 observations, from 155 keys to 114 keys.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
155 keys
127 keys
30 SEP 2025 · 20:44 UTC
155 keys
127 keys
9 OCT 2025 · 08:27 UTC
148 keys
133 keys
19 OCT 2025 · 20:14 UTC
141 keys
127 keys
25 OCT 2025 · 16:34 UTC
134 keys
121 keys
10 NOV 2025 · 00:35 UTC
132 keys
119 keys
5 MAR 2026 · 14:42 UTC
139 keys
115 keys
8 MAR 2026 · 18:42 UTC
146 keys
122 keys
22 JUN 2026 · 17:13 UTC
119 keys
103 keys
29 JUN 2026 · 01:14 UTC
128 keys
111 keys
5 JUL 2026 · 21:12 UTC
123 keys
107 keys
12 JUL 2026 · 20:45 UTC
126 keys
109 keys
19 JUL 2026 · 20:45 UTC
131 keys
114 keys
29 JUL 2026 · 02:45 UTC
136 keys
118 keys
7 AUG 2026 · 05:12 UTC
141 keys
122 keys
11 AUG 2026 · 13:12 UTC
142 keys
123 keys
15 AUG 2026 · 07:11 UTC
141 keys
123 keys
21 AUG 2026 · 14:08 UTC
95.6 keys
83.2 keys
23 AUG 2026 · 06:09 UTC
97.1 keys
84.5 keys
5 SEP 2026 · 12:10 UTC
114 keys
99.5 keys
Price history in numbers
20 readings since 25 Sep 2025
Over the last 30 days the Bubbling Soldered Sensei's sell price ranged from 95.6 keys to 142 keys and is down 18.7% after 5 moves. Over a year it ranged from 95.6 keys to 155 keys (down 26.3%). Today's 114 keys sits in the lower third of its range: the lowest we have recorded is 95.6 keys (21 Aug 2026) and the highest 155 keys (25 Sep 2025). The price has moved 19 times since we began recording it — about once every 18 days.
Salvaged Mann Co. Supply Crate #30