Community price on backpack.tf: 17.0 keys, last changed 2023-05-19 (3.3y ago). The live quote above, 12.5 keys, is 26% lower and last moved 12h 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: $40.87 — the lowest of one listing for the Massed Flies effect when we looked on 2026-09-01 01:48 UTC (5d 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 12 keys, 30.77 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 Hotrod”, with no effect in the name — the effect comes from the individual listing.
Price history
34 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.
Massed Flies Hotrod sell price, 2025-09-25 to 2026-09-05: 34 observations, from 17.5 keys to 12.5 keys.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
17.5 keys
14.3 keys
30 SEP 2025 · 20:18 UTC
17.5 keys
14.3 keys
9 OCT 2025 · 08:03 UTC
16.8 keys
15.1 keys
19 OCT 2025 · 19:48 UTC
15.9 keys
14.3 keys
25 OCT 2025 · 16:06 UTC
15.2 keys
13.7 keys
10 NOV 2025 · 00:08 UTC
17.6 keys
15.8 keys
4 JAN 2026 · 08:44 UTC
15.5 keys
11.2 keys
22 JAN 2026 · 05:43 UTC
14.4 keys
9.31 keys
15 FEB 2026 · 04:40 UTC
15.0 keys
9.97 keys
23 FEB 2026 · 14:39 UTC
14.1 keys
8.40 keys
5 MAR 2026 · 14:41 UTC
13.9 keys
9.95 keys
8 MAR 2026 · 22:41 UTC
13.8 keys
8.61 keys
15 MAR 2026 · 22:06 UTC
14.7 keys
9.68 keys
2 APR 2026 · 20:30 UTC
15.0 keys
8.87 keys
11 APR 2026 · 12:30 UTC
14.8 keys
8.44 keys
22 APR 2026 · 04:29 UTC
14.6 keys
9.27 keys
29 APR 2026 · 14:29 UTC
13.7 keys
8.67 keys
13 MAY 2026 · 12:31 UTC
14.5 keys
10.4 keys
16 MAY 2026 · 00:30 UTC
14.4 keys
9.85 keys
24 MAY 2026 · 06:30 UTC
14.4 keys
9.61 keys
5 JUN 2026 · 00:30 UTC
14.5 keys
9.59 keys
8 JUN 2026 · 06:30 UTC
14.4 keys
9.47 keys
15 JUN 2026 · 06:29 UTC
13.7 keys
9.35 keys
22 JUN 2026 · 00:10 UTC
14.2 keys
9.88 keys
30 JUN 2026 · 03:12 UTC
11.5 keys
10.0 keys
5 JUL 2026 · 23:12 UTC
11.0 keys
9.54 keys
12 JUL 2026 · 22:44 UTC
11.1 keys
9.63 keys
19 JUL 2026 · 22:44 UTC
11.4 keys
9.97 keys
29 JUL 2026 · 02:45 UTC
12.2 keys
10.5 keys
3 AUG 2026 · 00:24 UTC
12.3 keys
10.7 keys
11 AUG 2026 · 11:11 UTC
13.1 keys
11.5 keys
17 AUG 2026 · 09:11 UTC
12.5 keys
10.8 keys
4 SEP 2026 · 18:08 UTC
12.5 keys
10.9 keys
5 SEP 2026 · 06:07 UTC
12.5 keys
10.9 keys
Price history in numbers
34 readings since 25 Sep 2025
Over the last 30 days the Massed Flies Hotrod's sell price ranged from 12.5 keys to 13.1 keys and is down 4.8% after 3 moves. Over a year it ranged from 11.0 keys to 17.6 keys (down 28.6%). Today's 12.5 keys sits in the lower third of its range: the lowest we have recorded is 11.0 keys (5 Jul 2026) and the highest 17.6 keys (10 Nov 2025). The price has moved 33 times since we began recording it — about once every 10 days.