Community price on backpack.tf: 10.0 keys, last changed 2026-05-26 (3mo ago). The live quote above, 10.9 keys, is 9% higher and last moved 24h 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: $59.45 — the lowest of one listing for the Soundwave effect when we looked on 2026-09-04 01:41 UTC (2d 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 10 keys, 55 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 Undercover Brolly”, with no effect in the name — the effect comes from the individual listing.
Price history
50 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.
Soundwave Undercover Brolly sell price, 2025-09-25 to 2026-09-04: 50 observations, from 14.3 keys to 10.9 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
14.3 keys
10.9 keys
30 SEP 2025 · 22:51 UTC
15.4 keys
11.7 keys
19 OCT 2025 · 22:18 UTC
14.0 keys
11.7 keys
25 OCT 2025 · 18:31 UTC
13.3 keys
11.2 keys
10 NOV 2025 · 02:26 UTC
14.1 keys
11.8 keys
18 NOV 2025 · 06:45 UTC
15.8 keys
9.12 keys
1 DEC 2025 · 01:05 UTC
15.5 keys
11.4 keys
8 DEC 2025 · 00:56 UTC
17.2 keys
8.56 keys
15 DEC 2025 · 02:59 UTC
14.7 keys
8.81 keys
22 DEC 2025 · 13:14 UTC
15.9 keys
9.16 keys
4 JAN 2026 · 22:58 UTC
14.7 keys
9.72 keys
11 JAN 2026 · 23:39 UTC
13.5 keys
10.8 keys
22 JAN 2026 · 01:46 UTC
13.2 keys
8.92 keys
29 JAN 2026 · 01:46 UTC
13.0 keys
9.96 keys
8 FEB 2026 · 22:45 UTC
11.3 keys
7.79 keys
15 FEB 2026 · 22:41 UTC
11.6 keys
8.59 keys
22 FEB 2026 · 04:42 UTC
11.0 keys
7.83 keys
1 MAR 2026 · 00:43 UTC
11.6 keys
8.39 keys
15 MAR 2026 · 16:09 UTC
10.6 keys
8.41 keys
23 MAR 2026 · 20:08 UTC
12.1 keys
8.35 keys
1 APR 2026 · 00:31 UTC
12.4 keys
8.85 keys
12 APR 2026 · 22:31 UTC
11.5 keys
9.02 keys
1 MAY 2026 · 22:32 UTC
11.6 keys
8.21 keys
9 MAY 2026 · 20:28 UTC
12.4 keys
7.45 keys
17 MAY 2026 · 22:33 UTC
12.3 keys
9.37 keys
24 MAY 2026 · 22:32 UTC
11.5 keys
8.05 keys
8 JUN 2026 · 06:32 UTC
12.2 keys
8.34 keys
15 JUN 2026 · 08:33 UTC
12.1 keys
7.96 keys
22 JUN 2026 · 00:12 UTC
14.1 keys
8.19 keys
29 JUN 2026 · 01:14 UTC
8.98 keys
7.82 keys
17 JUL 2026 · 00:44 UTC
9.33 keys
8.11 keys
22 JUL 2026 · 00:48 UTC
9.20 keys
8.01 keys
30 JUL 2026 · 02:44 UTC
9.35 keys
8.14 keys
4 AUG 2026 · 21:12 UTC
9.75 keys
8.50 keys
19 AUG 2026 · 16:10 UTC
10.2 keys
8.87 keys
23 AUG 2026 · 16:11 UTC
9.40 keys
8.17 keys
24 AUG 2026 · 14:09 UTC
6.40 keys
5.57 keys
31 AUG 2026 · 08:09 UTC
9.80 keys
8.52 keys
4 SEP 2026 · 00:09 UTC
10.4 keys
9.08 keys
4 SEP 2026 · 18:08 UTC
10.9 keys
9.45 keys
Price history in numbers
50 readings since 25 Sep 2025
Over the last 30 days the Soundwave Undercover Brolly's sell price ranged from 6.40 keys to 10.9 keys and is up 13.6% after 7 moves. Over a year it ranged from 6.40 keys to 17.2 keys (down 24.1%). Today's 10.9 keys sits in the middle of its range: the lowest we have recorded is 6.40 keys (24 Aug 2026) and the highest 17.2 keys (8 Dec 2025). The price has moved 49 times since we began recording it — about once every 7 days.