This price has not changed since 2026-09-24 00:09 UTC. It reflects the last observed trade rather than current market value, and this page is excluded from our sitemap for that reason.
Community price on backpack.tf: 103 keys, last changed 2026-04-25 (6mo ago). The live quote above, 74.7 keys, is 27% lower and last moved 1mo 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: $250.00 — the lowest of one listing for the Green Energy effect when we looked on 2026-10-31 01:46 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 74 keys, 46.11 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 Flatline Flatcap”, with no effect in the name — the effect comes from the individual 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 |
|---|---|---|
| 15 JUN 2026 · 14:09 UTC | 98.0 keys | 88.1 keys |
| 8 JUL 2026 · 13:12 UTC | 38.4 keys | 33.4 keys |
| 22 JUL 2026 · 16:46 UTC | 38.1 keys | 33.1 keys |
| 29 JUL 2026 · 00:45 UTC | 12.5 keys | 10.9 keys |
| 7 AUG 2026 · 11:13 UTC | 43.9 keys | 38.3 keys |
| 14 AUG 2026 · 09:12 UTC | 33.9 keys | 29.6 keys |
| 23 AUG 2026 · 16:11 UTC | 12.9 keys | 11.2 keys |
| 27 AUG 2026 · 10:09 UTC | 45.3 keys | 39.4 keys |
| 28 AUG 2026 · 03:05 UTC | 43.0 keys | 37.4 keys |
| 28 AUG 2026 · 14:10 UTC | 41.4 keys | 36.0 keys |
| 29 AUG 2026 · 02:09 UTC | 45.5 keys | 39.6 keys |
| 29 AUG 2026 · 14:09 UTC | 46.1 keys | 40.1 keys |
| 30 AUG 2026 · 02:10 UTC | 46.3 keys | 40.3 keys |
| 30 AUG 2026 · 20:10 UTC | 52.7 keys | 45.8 keys |
| 31 AUG 2026 · 08:09 UTC | 52.7 keys | 45.8 keys |
| 31 AUG 2026 · 20:11 UTC | 12.6 keys | 11.0 keys |
| 1 SEP 2026 · 10:09 UTC | 43.6 keys | 37.9 keys |
| 1 SEP 2026 · 22:08 UTC | 45.0 keys | 39.1 keys |
| 2 SEP 2026 · 12:09 UTC | 44.4 keys | 38.6 keys |
| 3 SEP 2026 · 22:09 UTC | 13.0 keys | 11.3 keys |
| 6 SEP 2026 · 18:09 UTC | 67.0 keys | 58.2 keys |
| 7 SEP 2026 · 10:08 UTC | 13.2 keys | 11.5 keys |
| 7 SEP 2026 · 22:08 UTC | 13.3 keys | 11.6 keys |
| 8 SEP 2026 · 14:08 UTC | 13.1 keys | 11.4 keys |
| 9 SEP 2026 · 04:09 UTC | 12.7 keys | 11.0 keys |
| 9 SEP 2026 · 16:10 UTC | 12.7 keys | 11.1 keys |
| 14 SEP 2026 · 22:08 UTC | 46.2 keys | 40.1 keys |
| 15 SEP 2026 · 12:08 UTC | 46.7 keys | 40.6 keys |
| 17 SEP 2026 · 08:09 UTC | 68.5 keys | 59.6 keys |
| 18 SEP 2026 · 06:07 UTC | 68.4 keys | 59.5 keys |
| 18 SEP 2026 · 18:08 UTC | 69.3 keys | 60.2 keys |
| 19 SEP 2026 · 06:08 UTC | 69.8 keys | 60.7 keys |
| 19 SEP 2026 · 18:08 UTC | 69.9 keys | 60.8 keys |
| 21 SEP 2026 · 00:11 UTC | 71.3 keys | 62.0 keys |
| 21 SEP 2026 · 12:08 UTC | 70.9 keys | 61.6 keys |
| 22 SEP 2026 · 00:09 UTC | 72.6 keys | 63.2 keys |
| 22 SEP 2026 · 12:09 UTC | 72.8 keys | 63.3 keys |
| 23 SEP 2026 · 00:09 UTC | 73.6 keys | 64.0 keys |
| 23 SEP 2026 · 12:08 UTC | 73.7 keys | 64.1 keys |
| 24 SEP 2026 · 00:09 UTC | 74.7 keys | 65.0 keys |
Price history in numbers
43 readings since 15 Jun 2026The price has not been re-read inside the last 30 days. Over a year it ranged from 12.5 keys to 98.0 keys (down 23.7%). Today's 74.7 keys sits in the upper third of its range: the lowest we have recorded is 12.5 keys (29 Jul 2026) and the highest 98.0 keys (15 Jun 2026). The price has moved 42 times since we began recording it — about once every 2 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| 90 days | 12.6 keys | 74.7 keys | +120.1% | 37 | 38 |
| a year | 12.5 keys | 98.0 keys | −23.7% | 42 | 43 |
Details
| SKU | 31599;5;u9 |
|---|---|
| Last price change | 2026-09-24 00:09 UTC |
| Key rate when recorded | 63.89 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 7,000 keys | 12mo ago | |
| 5,800 keys | 12mo ago | |
| 2,100 keys | 12mo ago | |
| 1,337 keys | 12mo ago | |
| 1,200 keys | 12mo ago | |
| 1,200 keys | 12mo ago | |
| 1,050 keys | 12mo ago | |
| 1,000 keys | 12mo ago | |
| 1,011 keys | 1mo ago | |
| 900 keys | 1mo ago |
Other effects on the Flatline Flatcap
same item, different effect| Item | Value | Updated |
|---|---|---|
| 25.7 keys | 3mo ago | |
| 25.0 keys | 5mo ago | |
| 19.5 keys | 6mo ago |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
| 74.2 keys | 3mo ago | |
| 75.5 keys | 1mo ago | |
| 73.8 keys | 1mo ago | |
| 74.2 keys | 3mo ago | |
| 74.7 keys | 1mo ago | |
| 74.2 keys | 3mo ago | |
| 74.4 keys | 2mo ago | |
| 74.9 keys | 1mo ago |