Community price on backpack.tf: 66.0 keys, last changed 2025-09-07 (12mo ago). The live quote above, 42.2 keys, is 36% lower and last moved 15d 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: $162.51 — the lowest of one listing for the Cloud 9 effect when we looked on 2026-09-01 01:34 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 42 keys, 10.11 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 Virus Doctor”, with no effect in the name — the effect comes from the individual listing.
Price history
35 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.
Cloud 9 Virus Doctor sell price, 2025-09-25 to 2026-08-21: 35 observations, from 65.9 keys to 42.2 keys.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
65.9 keys
53.9 keys
30 SEP 2025 · 20:49 UTC
66.8 keys
54.7 keys
9 OCT 2025 · 08:32 UTC
63.8 keys
57.5 keys
19 OCT 2025 · 20:19 UTC
60.7 keys
54.7 keys
25 OCT 2025 · 16:40 UTC
57.9 keys
52.1 keys
10 NOV 2025 · 00:41 UTC
61.1 keys
55.1 keys
17 NOV 2025 · 04:35 UTC
60.6 keys
37.4 keys
23 NOV 2025 · 20:41 UTC
65.0 keys
43.2 keys
1 DEC 2025 · 00:53 UTC
65.0 keys
44.5 keys
10 DEC 2025 · 02:46 UTC
66.0 keys
46.8 keys
15 DEC 2025 · 00:42 UTC
67.1 keys
48.6 keys
22 DEC 2025 · 15:08 UTC
66.1 keys
47.9 keys
3 JAN 2026 · 00:46 UTC
65.0 keys
42.9 keys
11 JAN 2026 · 17:34 UTC
59.7 keys
43.4 keys
22 JAN 2026 · 01:43 UTC
60.4 keys
44.0 keys
29 JAN 2026 · 05:43 UTC
59.7 keys
43.6 keys
4 FEB 2026 · 12:21 UTC
57.0 keys
41.7 keys
8 FEB 2026 · 22:42 UTC
55.6 keys
40.7 keys
15 FEB 2026 · 12:40 UTC
59.7 keys
43.7 keys
22 FEB 2026 · 22:41 UTC
56.1 keys
24.8 keys
1 MAR 2026 · 00:41 UTC
55.6 keys
36.6 keys
8 MAR 2026 · 20:42 UTC
55.1 keys
36.9 keys
16 MAR 2026 · 04:07 UTC
54.3 keys
36.5 keys
22 MAR 2026 · 22:06 UTC
58.4 keys
39.3 keys
30 MAR 2026 · 02:07 UTC
59.8 keys
40.3 keys
10 APR 2026 · 08:29 UTC
59.8 keys
40.4 keys
8 JUN 2026 · 20:31 UTC
58.4 keys
40.3 keys
22 JUN 2026 · 17:13 UTC
47.0 keys
40.8 keys
10 JUL 2026 · 18:45 UTC
31.3 keys
27.2 keys
22 JUL 2026 · 12:46 UTC
42.7 keys
37.2 keys
29 JUL 2026 · 12:46 UTC
45.2 keys
39.3 keys
3 AUG 2026 · 00:24 UTC
52.6 keys
45.7 keys
10 AUG 2026 · 01:11 UTC
57.0 keys
49.6 keys
18 AUG 2026 · 05:11 UTC
44.7 keys
38.9 keys
21 AUG 2026 · 18:09 UTC
42.2 keys
36.7 keys
Price history in numbers
35 readings since 25 Sep 2025
Over the last 30 days the Cloud 9 Virus Doctor's sell price ranged from 42.2 keys to 57.0 keys and is down 26.0% after 2 moves. Over a year it ranged from 31.3 keys to 67.1 keys (down 36.0%). Today's 42.2 keys sits in the lower third of its range: the lowest we have recorded is 31.3 keys (10 Jul 2026) and the highest 67.1 keys (15 Dec 2025). The price has moved 32 times since we began recording it — about once every 10 days.