Community price on backpack.tf: 63.0 keys, last changed 2024-04-01 (2.4y ago). The live quote above, 52.4 keys, is 17% lower and last moved 4h 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: $173.76 — the lowest of one listing for the Green Energy effect when we looked on 2026-09-03 01:22 UTC (3d 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 52 keys, 23.44 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 Human Cannonball”, with no effect in the name — the effect comes from the individual listing.
Price history
60 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.
Green Energy Human Cannonball sell price, 2025-09-25 to 2026-09-05: 60 observations, from 51.6 keys to 52.4 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
51.6 keys
45.2 keys
5 OCT 2025 · 22:07 UTC
54.4 keys
48.3 keys
12 OCT 2025 · 22:53 UTC
54.1 keys
49.4 keys
29 OCT 2025 · 00:01 UTC
52.7 keys
35.5 keys
2 NOV 2025 · 22:31 UTC
53.5 keys
37.3 keys
15 NOV 2025 · 20:31 UTC
56.8 keys
40.1 keys
25 NOV 2025 · 14:47 UTC
60.9 keys
39.3 keys
10 DEC 2025 · 00:42 UTC
54.8 keys
40.0 keys
16 DEC 2025 · 22:37 UTC
63.0 keys
40.6 keys
30 DEC 2025 · 20:46 UTC
56.9 keys
9.85 keys
4 JAN 2026 · 22:49 UTC
53.9 keys
10.2 keys
18 JAN 2026 · 23:23 UTC
49.6 keys
11.6 keys
29 JAN 2026 · 17:42 UTC
43.0 keys
11.9 keys
8 FEB 2026 · 22:41 UTC
39.1 keys
12.3 keys
15 FEB 2026 · 20:39 UTC
37.9 keys
12.2 keys
23 MAR 2026 · 16:05 UTC
42.1 keys
32.7 keys
29 MAR 2026 · 22:06 UTC
43.0 keys
34.1 keys
12 APR 2026 · 22:29 UTC
45.1 keys
34.2 keys
19 APR 2026 · 22:29 UTC
45.1 keys
35.1 keys
3 MAY 2026 · 22:30 UTC
46.4 keys
33.2 keys
8 MAY 2026 · 14:30 UTC
49.3 keys
35.5 keys
24 MAY 2026 · 22:29 UTC
43.9 keys
35.5 keys
22 JUN 2026 · 17:13 UTC
43.4 keys
37.8 keys
5 JUL 2026 · 23:12 UTC
43.1 keys
37.5 keys
12 JUL 2026 · 22:44 UTC
43.5 keys
37.8 keys
29 JUL 2026 · 02:45 UTC
47.6 keys
41.4 keys
3 AUG 2026 · 00:24 UTC
49.4 keys
42.9 keys
17 AUG 2026 · 21:11 UTC
50.0 keys
43.4 keys
25 AUG 2026 · 14:09 UTC
40.8 keys
35.5 keys
29 AUG 2026 · 00:09 UTC
11.0 keys
9.60 keys
29 AUG 2026 · 12:09 UTC
11.1 keys
9.62 keys
30 AUG 2026 · 12:08 UTC
11.4 keys
9.95 keys
31 AUG 2026 · 00:08 UTC
11.3 keys
9.79 keys
1 SEP 2026 · 00:08 UTC
11.2 keys
9.79 keys
1 SEP 2026 · 12:08 UTC
11.2 keys
9.76 keys
2 SEP 2026 · 12:08 UTC
11.2 keys
9.73 keys
3 SEP 2026 · 08:08 UTC
51.7 keys
45.0 keys
4 SEP 2026 · 08:08 UTC
53.9 keys
46.9 keys
4 SEP 2026 · 20:07 UTC
52.3 keys
45.5 keys
5 SEP 2026 · 20:08 UTC
52.4 keys
45.6 keys
Price history in numbers
60 readings since 25 Sep 2025
Over the last 30 days the Green Energy Human Cannonball's sell price ranged from 11.0 keys to 53.9 keys and is up 4.7% after 19 moves. Over a year it ranged from 11.0 keys to 63.0 keys (up 1.6%). Today's 52.4 keys sits in the upper third of its range: the lowest we have recorded is 11.0 keys (28 Aug 2026) and the highest 63.0 keys (16 Dec 2025). The price has moved 59 times since we began recording it — about once every 6 days.