This price has not changed since 2026-08-06 07:13 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: 130–225 keys, last changed 2025-03-17 (1.5y ago). The live quote above, 68.7 keys, is 47% 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: $535.37 — the lowest of one listing for the Phantom Plague effect when we looked on 2026-09-01 01:43 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 68 keys, 47.66 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 Duality of Mantle”, 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 |
|---|---|---|
| 25 SEP 2025 · 03:29 UTC | 224 keys | 107 keys |
| 30 SEP 2025 · 23:03 UTC | 224 keys | 106 keys |
| 9 OCT 2025 · 10:34 UTC | 214 keys | 111 keys |
| 19 OCT 2025 · 22:32 UTC | 203 keys | 106 keys |
| 25 OCT 2025 · 18:45 UTC | 194 keys | 101 keys |
| 10 NOV 2025 · 02:40 UTC | 217 keys | 113 keys |
| 6 AUG 2026 · 07:13 UTC | 68.7 keys | 59.8 keys |
Price history in numbers
7 readings since 25 Sep 2025The price has not been re-read inside the last 30 days. Over a year it ranged from 68.7 keys to 224 keys (down 69.3%). Today's 68.7 keys sits at the bottom of its range: the lowest we have recorded is 68.7 keys (6 Aug 2026) and the highest 224 keys (25 Sep 2025). The price has moved 6 times since we began recording it — about once every 53 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| a year | 68.7 keys | 224 keys | −69.3% | 6 | 7 |
Details
| SKU | 31472;5;u355 |
|---|---|
| Last price change | 2026-08-06 07:13 UTC |
| Key rate when recorded | 64.33 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 251 keys | 1mo ago | |
| 230 keys | 2mo ago | |
| 194 keys | 15d ago | |
| 173 keys | 13d ago | |
| 109 keys | 1d ago | |
| 103 keys | 21h ago | |
| 97.9 keys | 5h ago | |
| 88.1 keys | 18d ago | |
| 79.9 keys | 9mo ago | |
| 79.6 keys | 3d ago |
Other effects on the Duality of Mantle
same item, different effect| Item | Value | Updated |
|---|---|---|
| 805 keys | 10mo ago | |
| 411 keys | 10mo ago | |
| 401 keys | 6mo ago | |
| 268 keys | 10mo ago | |
| 260 keys | 10mo ago | |
| 260 keys | 10mo ago | |
| 250 keys | 10mo ago | |
| 184 keys | 1mo ago | |
| 176 keys | 2mo ago | |
| 175 keys | 10mo ago |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
| 71.3 keys | 9h ago | |
| 68.7 keys | 1mo ago | |
| 68.7 keys | 29d ago | |
| 70.1 keys | 3h ago | |
| 71.5 keys | 5h ago | |
| 68.9 keys | 5d ago | |
| 70.0 keys | 3h ago | |
| 68.7 keys | 18d ago |