Community price on backpack.tf: 39.0 keys, last changed 2026-02-04 (8mo ago). The live quote above, 27.3 keys, is 30% lower 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.
Price history
70 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 Professor Photon sell price, 2026-04-24 to 2026-10-13: 70 observations, from 33.6 keys to 40.3 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
24 APR 2026 · 22:32 UTC
33.6 keys
5.78 keys
10 JUL 2026 · 20:45 UTC
6.73 keys
5.85 keys
4 AUG 2026 · 01:11 UTC
21.2 keys
18.5 keys
13 AUG 2026 · 15:12 UTC
26.1 keys
22.8 keys
29 AUG 2026 · 18:10 UTC
32.9 keys
28.7 keys
30 AUG 2026 · 22:10 UTC
33.0 keys
28.7 keys
31 AUG 2026 · 22:10 UTC
32.9 keys
28.6 keys
1 SEP 2026 · 10:09 UTC
32.8 keys
28.5 keys
2 SEP 2026 · 10:08 UTC
32.6 keys
28.3 keys
3 SEP 2026 · 20:08 UTC
38.0 keys
33.0 keys
4 SEP 2026 · 22:08 UTC
37.5 keys
32.6 keys
5 SEP 2026 · 14:09 UTC
38.1 keys
33.2 keys
6 SEP 2026 · 18:09 UTC
37.9 keys
32.9 keys
7 SEP 2026 · 18:08 UTC
40.6 keys
35.3 keys
8 SEP 2026 · 22:09 UTC
41.3 keys
35.9 keys
10 SEP 2026 · 20:09 UTC
41.9 keys
36.5 keys
11 SEP 2026 · 08:08 UTC
42.0 keys
36.6 keys
12 SEP 2026 · 08:10 UTC
42.2 keys
36.7 keys
13 SEP 2026 · 08:09 UTC
42.5 keys
37.0 keys
14 SEP 2026 · 08:08 UTC
42.9 keys
37.3 keys
14 SEP 2026 · 20:08 UTC
43.2 keys
37.6 keys
15 SEP 2026 · 20:09 UTC
43.4 keys
37.8 keys
17 SEP 2026 · 08:09 UTC
43.8 keys
38.1 keys
18 SEP 2026 · 08:08 UTC
44.0 keys
38.3 keys
20 SEP 2026 · 16:11 UTC
29.4 keys
25.6 keys
25 SEP 2026 · 22:10 UTC
24.2 keys
21.1 keys
27 SEP 2026 · 00:09 UTC
24.8 keys
21.5 keys
28 SEP 2026 · 00:09 UTC
26.1 keys
22.7 keys
29 SEP 2026 · 00:09 UTC
26.5 keys
23.0 keys
29 SEP 2026 · 12:09 UTC
26.7 keys
23.2 keys
30 SEP 2026 · 12:09 UTC
26.9 keys
23.4 keys
1 OCT 2026 · 12:09 UTC
27.3 keys
23.8 keys
4 OCT 2026 · 23:10 UTC
28.3 keys
24.6 keys
5 OCT 2026 · 11:09 UTC
28.4 keys
24.7 keys
6 OCT 2026 · 17:09 UTC
37.7 keys
32.7 keys
7 OCT 2026 · 17:10 UTC
38.4 keys
33.4 keys
10 OCT 2026 · 01:10 UTC
39.6 keys
34.4 keys
10 OCT 2026 · 13:10 UTC
39.7 keys
34.5 keys
12 OCT 2026 · 07:08 UTC
39.7 keys
34.6 keys
13 OCT 2026 · 07:09 UTC
40.3 keys
35.0 keys
Price history in numbers
70 readings since 24 Apr 2026
Over the last 30 days the Green Energy Professor Photon's sell price ranged from 23.3 keys to 44.4 keys and is down 5.4% after 35 moves. Over a year it ranged from 6.73 keys to 44.4 keys (up 19.7%). Today's 40.3 keys sits in the upper third of its range: the lowest we have recorded is 6.73 keys (10 Jul 2026) and the highest 44.4 keys (17 Sep 2026). The price has moved 68 times since we began recording it — about once every 3 days.