Community price on backpack.tf: 32.0–45.0 keys, last changed 2023-12-04 (2.9y ago). The live quote above, 79.0 keys, is 147% higher and last moved 12d 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
120 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.
Purple Energy Professor's Peculiarity sell price, 2025-09-25 to 2026-10-13: 120 observations, from 46.2 keys to 83.3 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
46.2 keys
26.8 keys
19 OCT 2025 · 19:59 UTC
42.9 keys
26.8 keys
22 JUN 2026 · 17:13 UTC
49.8 keys
43.3 keys
12 JUL 2026 · 22:44 UTC
49.4 keys
43.0 keys
3 AUG 2026 · 00:24 UTC
57.2 keys
49.7 keys
21 AUG 2026 · 16:08 UTC
58.0 keys
50.5 keys
23 AUG 2026 · 04:09 UTC
59.4 keys
51.7 keys
24 AUG 2026 · 16:08 UTC
61.1 keys
53.1 keys
26 AUG 2026 · 04:09 UTC
62.6 keys
54.4 keys
27 AUG 2026 · 16:08 UTC
64.7 keys
56.2 keys
29 AUG 2026 · 16:09 UTC
66.3 keys
57.7 keys
31 AUG 2026 · 04:09 UTC
66.2 keys
57.6 keys
1 SEP 2026 · 16:08 UTC
66.3 keys
57.6 keys
3 SEP 2026 · 04:08 UTC
65.9 keys
57.3 keys
4 SEP 2026 · 16:08 UTC
66.6 keys
57.9 keys
6 SEP 2026 · 04:10 UTC
66.7 keys
58.0 keys
7 SEP 2026 · 16:07 UTC
68.9 keys
59.9 keys
9 SEP 2026 · 04:08 UTC
67.9 keys
59.0 keys
10 SEP 2026 · 16:08 UTC
69.4 keys
60.3 keys
12 SEP 2026 · 04:09 UTC
69.3 keys
60.3 keys
13 SEP 2026 · 16:08 UTC
69.7 keys
60.6 keys
15 SEP 2026 · 04:08 UTC
71.0 keys
61.8 keys
16 SEP 2026 · 16:08 UTC
72.3 keys
62.8 keys
18 SEP 2026 · 04:07 UTC
73.7 keys
64.1 keys
19 SEP 2026 · 16:08 UTC
75.4 keys
65.6 keys
21 SEP 2026 · 06:09 UTC
77.0 keys
67.0 keys
22 SEP 2026 · 18:09 UTC
77.9 keys
67.7 keys
24 SEP 2026 · 06:08 UTC
80.0 keys
69.5 keys
25 SEP 2026 · 18:08 UTC
80.8 keys
70.3 keys
27 SEP 2026 · 08:09 UTC
81.6 keys
71.0 keys
29 SEP 2026 · 08:08 UTC
80.9 keys
70.4 keys
30 SEP 2026 · 20:09 UTC
79.5 keys
69.1 keys
2 OCT 2026 · 09:09 UTC
79.7 keys
69.3 keys
3 OCT 2026 · 23:09 UTC
81.4 keys
70.8 keys
5 OCT 2026 · 15:09 UTC
82.3 keys
71.6 keys
7 OCT 2026 · 03:09 UTC
82.7 keys
71.9 keys
8 OCT 2026 · 15:09 UTC
83.4 keys
72.5 keys
10 OCT 2026 · 03:10 UTC
84.0 keys
73.0 keys
11 OCT 2026 · 15:08 UTC
84.2 keys
73.2 keys
13 OCT 2026 · 03:08 UTC
83.3 keys
72.5 keys
Price history in numbers
120 readings since 25 Sep 2025
Over the last 30 days the Purple Energy Professor's Peculiarity's sell price ranged from 69.3 keys to 84.2 keys and is up 19.6% after 58 moves. Over a year it ranged from 40.8 keys to 84.2 keys (up 94.3%). Today's 83.3 keys sits at the top of its range: the lowest we have recorded is 40.8 keys (25 Oct 2025) and the highest 84.2 keys (11 Oct 2026). The price has moved 119 times since we began recording it — about once every 3 days.
Collector's Harmburg