Community price on backpack.tf: 18.0–23.0 keys, last changed 2024-01-19 (2.7y ago). The live quote above, 19.8 keys, is inside the community’s range and last moved 11d 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: $45.31 — the lowest of 3 listings for the Fireflies effect when we looked on 2026-10-13 01:38 UTC (6h 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 19 keys, 48.66 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 Brothers in Blues”, with no effect in the name — the effect comes from the individual listing.
Price history
123 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.
Fireflies Brothers in Blues sell price, 2025-09-25 to 2026-10-10: 123 observations, from 24.6 keys to 20.4 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
24.6 keys
15.1 keys
19 OCT 2025 · 22:26 UTC
22.4 keys
15.1 keys
18 NOV 2025 · 00:45 UTC
23.7 keys
18.9 keys
15 DEC 2025 · 00:55 UTC
26.6 keys
19.3 keys
11 JAN 2026 · 23:39 UTC
23.7 keys
17.5 keys
12 FEB 2026 · 16:41 UTC
20.4 keys
16.2 keys
1 MAR 2026 · 00:43 UTC
19.7 keys
16.8 keys
22 MAR 2026 · 22:08 UTC
19.1 keys
17.6 keys
19 APR 2026 · 22:32 UTC
18.2 keys
17.5 keys
9 MAY 2026 · 22:33 UTC
23.2 keys
17.4 keys
3 JUN 2026 · 22:33 UTC
21.9 keys
17.3 keys
23 JUN 2026 · 03:13 UTC
19.9 keys
17.3 keys
22 JUL 2026 · 00:48 UTC
20.3 keys
17.7 keys
10 AUG 2026 · 03:11 UTC
16.6 keys
14.3 keys
22 AUG 2026 · 06:08 UTC
17.2 keys
15.0 keys
23 AUG 2026 · 22:09 UTC
16.3 keys
14.2 keys
24 AUG 2026 · 10:09 UTC
17.0 keys
14.8 keys
24 AUG 2026 · 18:09 UTC
17.3 keys
15.0 keys
25 AUG 2026 · 04:09 UTC
16.4 keys
14.3 keys
25 AUG 2026 · 12:09 UTC
15.6 keys
13.5 keys
26 AUG 2026 · 00:09 UTC
16.2 keys
14.1 keys
26 AUG 2026 · 08:09 UTC
16.8 keys
14.6 keys
26 AUG 2026 · 18:09 UTC
17.2 keys
14.9 keys
27 AUG 2026 · 02:10 UTC
17.3 keys
15.1 keys
27 AUG 2026 · 20:11 UTC
18.3 keys
15.9 keys
10 SEP 2026 · 02:09 UTC
17.2 keys
15.0 keys
11 SEP 2026 · 12:09 UTC
17.8 keys
15.5 keys
15 SEP 2026 · 20:09 UTC
17.2 keys
15.0 keys
22 SEP 2026 · 22:08 UTC
20.1 keys
17.4 keys
24 SEP 2026 · 10:09 UTC
20.1 keys
17.5 keys
24 SEP 2026 · 20:08 UTC
20.1 keys
17.5 keys
25 SEP 2026 · 06:08 UTC
20.1 keys
17.5 keys
25 SEP 2026 · 16:08 UTC
20.2 keys
17.5 keys
26 SEP 2026 · 02:08 UTC
20.1 keys
17.5 keys
27 SEP 2026 · 18:09 UTC
20.4 keys
17.7 keys
29 SEP 2026 · 14:08 UTC
20.2 keys
17.5 keys
1 OCT 2026 · 20:08 UTC
19.8 keys
17.2 keys
5 OCT 2026 · 11:09 UTC
18.5 keys
16.1 keys
8 OCT 2026 · 09:10 UTC
20.5 keys
17.8 keys
10 OCT 2026 · 03:11 UTC
20.4 keys
17.7 keys
Price history in numbers
123 readings since 25 Sep 2025
Over the last 30 days the Fireflies Brothers in Blues's sell price ranged from 17.2 keys to 20.6 keys and is up 17.8% after 39 moves. Over a year it ranged from 15.6 keys to 27.4 keys (down 8.8%). Today's 20.4 keys sits in the middle of its range: the lowest we have recorded is 15.6 keys (25 Aug 2026) and the highest 27.4 keys (23 Nov 2025). The price has moved 122 times since we began recording it — about once every 3 days.