Community price on backpack.tf: 35.0 keys, last changed 2024-07-23 (2.2y ago). The live quote above, 31.4 keys, is 10% lower and last moved 13d 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: $161.22 — the lowest of one listing for the Contagious Eruption effect when we looked on 2026-10-06 01:34 UTC (7d 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 31 keys, 26.22 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 Detective”, with no effect in the name — the effect comes from the individual listing.
Price history
47 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.
Contagious Eruption Detective sell price, 2025-09-25 to 2026-10-12: 47 observations, from 35.4 keys to 13.0 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
35.4 keys
29.0 keys
30 SEP 2025 · 22:50 UTC
36.4 keys
29.8 keys
9 OCT 2025 · 10:21 UTC
34.8 keys
31.3 keys
25 OCT 2025 · 18:30 UTC
31.5 keys
28.4 keys
10 NOV 2025 · 02:25 UTC
32.3 keys
29.1 keys
22 JUN 2026 · 17:13 UTC
28.3 keys
24.6 keys
29 JUN 2026 · 01:14 UTC
22.3 keys
19.4 keys
5 JUL 2026 · 23:12 UTC
27.1 keys
23.5 keys
12 JUL 2026 · 16:45 UTC
24.7 keys
21.5 keys
29 JUL 2026 · 10:44 UTC
26.0 keys
22.7 keys
3 AUG 2026 · 08:24 UTC
21.0 keys
18.4 keys
10 AUG 2026 · 01:11 UTC
34.4 keys
30.0 keys
19 AUG 2026 · 20:10 UTC
20.2 keys
17.6 keys
21 AUG 2026 · 16:08 UTC
30.5 keys
26.5 keys
25 AUG 2026 · 18:10 UTC
31.8 keys
27.7 keys
26 AUG 2026 · 08:09 UTC
31.9 keys
27.8 keys
27 AUG 2026 · 06:09 UTC
31.9 keys
27.8 keys
29 AUG 2026 · 18:10 UTC
30.4 keys
26.4 keys
8 SEP 2026 · 10:09 UTC
31.6 keys
27.5 keys
8 SEP 2026 · 14:08 UTC
31.8 keys
27.7 keys
9 SEP 2026 · 08:09 UTC
32.3 keys
28.1 keys
9 SEP 2026 · 10:08 UTC
32.8 keys
28.5 keys
9 SEP 2026 · 16:10 UTC
32.5 keys
28.2 keys
9 SEP 2026 · 20:09 UTC
33.0 keys
28.7 keys
10 SEP 2026 · 00:09 UTC
33.0 keys
28.7 keys
10 SEP 2026 · 18:09 UTC
33.6 keys
29.2 keys
11 SEP 2026 · 18:09 UTC
34.4 keys
29.9 keys
12 SEP 2026 · 06:08 UTC
34.8 keys
30.3 keys
15 SEP 2026 · 14:08 UTC
25.4 keys
22.1 keys
17 SEP 2026 · 02:08 UTC
26.0 keys
22.6 keys
20 SEP 2026 · 22:11 UTC
20.8 keys
18.1 keys
26 SEP 2026 · 12:08 UTC
21.7 keys
18.9 keys
27 SEP 2026 · 02:10 UTC
22.1 keys
19.2 keys
28 SEP 2026 · 08:09 UTC
26.8 keys
23.3 keys
29 SEP 2026 · 00:09 UTC
31.2 keys
27.1 keys
29 SEP 2026 · 12:09 UTC
31.5 keys
27.4 keys
30 SEP 2026 · 00:09 UTC
31.4 keys
27.3 keys
10 OCT 2026 · 05:11 UTC
27.6 keys
24.0 keys
11 OCT 2026 · 23:09 UTC
23.2 keys
20.2 keys
12 OCT 2026 · 21:08 UTC
13.0 keys
11.3 keys
Price history in numbers
47 readings since 25 Sep 2025
Over the last 30 days the Contagious Eruption Detective's sell price ranged from 13.0 keys to 31.5 keys and is down 49.1% after 13 moves. Over a year it ranged from 13.0 keys to 34.8 keys (down 60.8%). Today's 13.0 keys sits at the bottom of its range: the lowest we have recorded is 13.0 keys (12 Oct 2026) and the highest 36.4 keys (30 Sep 2025). The price has moved 46 times since we began recording it — about once every 8 days.