Strange Professional Killstreak Black Box
2 sold on the Steam Community Market in the 24 hours to 2026-08-29 04:18 UTC (8d ago), listed there as “Strange Professional Killstreak Black Box”. That is a different market from the prices above: Steam takes roughly 15% and pays out in Steam wallet funds rather than cash, so its prices sit above what an item realises elsewhere. Volume is unavailable for unusuals — Steam’s name for one leaves out the effect, so every effect shares a single listing.
Price history
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.
| Observed (UTC) | Sell | Buy |
|---|---|---|
| 25 SEP 2025 · 03:29 UTC | 10.2 keys | 9.64 keys |
| 19 OCT 2025 · 22:08 UTC | 10.3 keys | 10.1 keys |
| 16 NOV 2025 · 22:45 UTC | 9.91 keys | 8.57 keys |
| 16 DEC 2025 · 02:55 UTC | 10.9 keys | 9.81 keys |
| 4 JAN 2026 · 23:00 UTC | 10.5 keys | 10.4 keys |
| 1 FEB 2026 · 23:46 UTC | 9.43 keys | 9.19 keys |
| 1 MAR 2026 · 06:44 UTC | 9.28 keys | 9.12 keys |
| 1 APR 2026 · 00:31 UTC | 9.67 keys | 9.24 keys |
| 3 MAY 2026 · 18:33 UTC | 9.29 keys | 9.29 keys |
| 1 JUN 2026 · 00:31 UTC | 9.71 keys | 9.45 keys |
| 29 JUN 2026 · 01:15 UTC | 10.2 keys | 9.82 keys |
| 29 JUL 2026 · 00:45 UTC | 10.4 keys | 10.4 keys |
| 21 AUG 2026 · 10:09 UTC | 10.8 keys | 10.6 keys |
| 21 AUG 2026 · 22:09 UTC | 10.8 keys | 10.6 keys |
| 22 AUG 2026 · 10:09 UTC | 10.8 keys | 10.7 keys |
| 23 AUG 2026 · 00:09 UTC | 11.4 keys | 10.7 keys |
| 23 AUG 2026 · 14:09 UTC | 11.4 keys | 10.7 keys |
| 24 AUG 2026 · 06:09 UTC | 12.3 keys | 10.7 keys |
| 24 AUG 2026 · 18:09 UTC | 11.4 keys | 10.8 keys |
| 25 AUG 2026 · 08:09 UTC | 11.4 keys | 10.5 keys |
| 25 AUG 2026 · 14:09 UTC | 11.4 keys | 10.5 keys |
| 26 AUG 2026 · 00:09 UTC | 11.4 keys | 10.6 keys |
| 26 AUG 2026 · 12:09 UTC | 12.2 keys | 10.6 keys |
| 26 AUG 2026 · 20:10 UTC | 12.2 keys | 10.6 keys |
| 27 AUG 2026 · 08:09 UTC | 12.3 keys | 10.7 keys |
| 27 AUG 2026 · 20:11 UTC | 11.4 keys | 10.7 keys |
| 28 AUG 2026 · 12:08 UTC | 11.4 keys | 10.5 keys |
| 29 AUG 2026 · 00:10 UTC | 11.5 keys | 10.5 keys |
| 29 AUG 2026 · 12:10 UTC | 11.4 keys | 10.5 keys |
| 30 AUG 2026 · 04:10 UTC | 10.8 keys | 10.6 keys |
| 30 AUG 2026 · 20:10 UTC | 12.2 keys | 10.6 keys |
| 31 AUG 2026 · 14:09 UTC | 12.3 keys | 10.7 keys |
| 1 SEP 2026 · 00:09 UTC | 11.4 keys | 10.7 keys |
| 1 SEP 2026 · 18:08 UTC | 11.3 keys | 10.7 keys |
| 2 SEP 2026 · 10:08 UTC | 11.0 keys | 10.6 keys |
| 3 SEP 2026 · 00:08 UTC | 11.1 keys | 10.9 keys |
| 3 SEP 2026 · 10:09 UTC | 11.0 keys | 10.9 keys |
| 3 SEP 2026 · 22:09 UTC | 11.2 keys | 11.2 keys |
| 4 SEP 2026 · 14:08 UTC | 11.0 keys | 11.0 keys |
| 5 SEP 2026 · 14:09 UTC | 11.1 keys | 10.0 keys |
Price history in numbers
152 readings since 25 Sep 2025Over the last 30 days the Strange Professional Killstreak Black Box's sell price ranged from 10.7 keys to 12.4 keys and is up 4.1% after 86 moves. Over a year it ranged from 9.07 keys to 12.4 keys (up 8.8%). Today's 11.1 keys sits in the middle of its range: the lowest we have recorded is 9.07 keys (15 Mar 2026) and the highest 12.4 keys (30 Aug 2026). The price has moved 131 times since we began recording it — about once every 3 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| 30 days | 10.7 keys | 12.4 keys | +4.1% | 86 | 107 |
| 90 days | 9.76 keys | 12.4 keys | +13.4% | 95 | 116 |
| a year | 9.07 keys | 12.4 keys | +8.8% | 131 | 152 |
Details
| SKU | 228;11;kt-3 |
|---|---|
| Last price change | 2026-09-05 14:09 UTC |
| Key rate when recorded | 63.11 ref |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
| 11.0 keys | 6d ago | |
| 11.3 keys | 1d ago | |
| 11.3 keys | 2d ago | |
| 10.9 keys | 17d ago | |
| 10.9 keys | 15h ago | |
| 11.3 keys | 11h ago | |
| 11.1 keys | 3h ago | |
| 11.0 keys | 7d ago |