This price has not changed since 2026-07-28 02:44 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: 30.0 keys, last changed 2025-03-17 (1.5y ago). The live quote above, 20.5 keys, is 32% 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: $37.01 — the lowest of one listing for the Massed Flies effect when we looked on 2026-09-04 01:55 UTC (2d 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 20 keys, 30 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 Top Brass”, 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 | 30.9 keys | 25.2 keys |
| 30 SEP 2025 · 23:03 UTC | 30.8 keys | 25.2 keys |
| 9 OCT 2025 · 10:35 UTC | 29.4 keys | 26.4 keys |
| 19 OCT 2025 · 22:33 UTC | 28.0 keys | 25.2 keys |
| 25 OCT 2025 · 18:45 UTC | 26.7 keys | 24.0 keys |
| 10 NOV 2025 · 02:40 UTC | 27.9 keys | 25.1 keys |
| 21 FEB 2026 · 06:43 UTC | 19.1 keys | 15.2 keys |
| 11 MAY 2026 · 12:33 UTC | 18.4 keys | 14.4 keys |
| 13 JUN 2026 · 04:32 UTC | 18.9 keys | 14.7 keys |
| 28 JUN 2026 · 19:13 UTC | 17.3 keys | 15.0 keys |
| 28 JUL 2026 · 02:44 UTC | 20.5 keys | 16.1 keys |
Price history in numbers
11 readings since 25 Sep 2025The price has not been re-read inside the last 30 days. Over a year it ranged from 17.3 keys to 30.9 keys (down 33.7%). Today's 20.5 keys sits in the lower third of its range: the lowest we have recorded is 17.3 keys (28 Jun 2026) and the highest 30.9 keys (25 Sep 2025). The price has moved 10 times since we began recording it — about once every 31 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| 90 days | 17.3 keys | 20.5 keys | +8.4% | 2 | 3 |
| a year | 17.3 keys | 30.9 keys | −33.7% | 10 | 11 |
Details
| SKU | 31511;5;u12 |
|---|---|
| Last price change | 2026-07-28 02:44 UTC |
| Key rate when recorded | 64.33 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 1,200 keys | 10mo ago | |
| 600 keys | 10mo ago | |
| 581 keys | 10mo ago | |
| 500 keys | 10mo ago | |
| 481 keys | 10mo ago | |
| 470 keys | 10mo ago | |
| 325 keys | 10mo ago | |
| 312 keys | 12h ago | |
| 253 keys | 2d ago | |
| 230 keys | 19d ago |
Other effects on the Top Brass
same item, different effect| Item | Value | Updated |
|---|---|---|
| 86.8 keys | 8h ago | |
| 38.9 keys | 2d ago | |
| 37.0 keys | 7mo ago | |
| 36.4 keys | 19d ago | |
| 32.1 keys | 7d ago | |
| 31.0 keys | 3mo ago | |
| 26.8 keys | 28d ago | |
| 19.4 keys | 12h ago | |
| 19.0 keys | 1mo ago | |
| 18.8 keys | 6d ago |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
| 20.5 keys | 3mo ago | |
| 20.5 keys | 2mo ago | |
| 20.5 keys | 12d ago | |
| 20.5 keys | 8mo ago | |
| 20.4 keys | 12h ago | |
| 20.9 keys | 2d ago | |
| 20.4 keys | 12h ago | |
| 20.5 keys | 7d ago |