Community price on backpack.tf: 145–150 keys, last changed 2026-02-28 (7mo ago). The live quote above, 112 keys, is 23% lower and last moved 14d 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: $325.45 — the lowest of 2 listings for the Massed Flies effect when we looked on 2026-10-08 01:23 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 112 keys, 16.22 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 Le Party Phantom”, with no effect in the name — the effect comes from the individual listing.
Price history
106 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.
Massed Flies Le Party Phantom sell price, 2025-09-25 to 2026-10-08: 106 observations, from 175 keys to 113 keys. Sampled evenly across the range.
Observed (UTC)
Sell
Buy
25 SEP 2025 · 03:29 UTC
175 keys
123 keys
19 OCT 2025 · 19:53 UTC
159 keys
123 keys
10 NOV 2025 · 00:13 UTC
159 keys
123 keys
8 MAR 2026 · 22:41 UTC
132 keys
70.3 keys
11 APR 2026 · 04:29 UTC
139 keys
71.3 keys
3 MAY 2026 · 22:30 UTC
128 keys
69.7 keys
24 MAY 2026 · 22:30 UTC
136 keys
106 keys
15 JUN 2026 · 00:30 UTC
124 keys
106 keys
12 JUL 2026 · 22:44 UTC
125 keys
109 keys
31 JUL 2026 · 02:43 UTC
84.6 keys
73.5 keys
21 AUG 2026 · 00:08 UTC
96.6 keys
84.0 keys
22 AUG 2026 · 12:08 UTC
96.3 keys
83.7 keys
23 AUG 2026 · 12:08 UTC
96.5 keys
83.9 keys
25 AUG 2026 · 00:08 UTC
96.6 keys
84.0 keys
26 AUG 2026 · 12:08 UTC
96.9 keys
84.2 keys
27 AUG 2026 · 12:08 UTC
96.8 keys
84.1 keys
29 AUG 2026 · 04:09 UTC
97.0 keys
84.4 keys
30 AUG 2026 · 16:07 UTC
102 keys
88.6 keys
31 AUG 2026 · 16:09 UTC
107 keys
93.0 keys
2 SEP 2026 · 04:08 UTC
105 keys
91.2 keys
3 SEP 2026 · 16:08 UTC
110 keys
95.8 keys
5 SEP 2026 · 04:08 UTC
111 keys
96.4 keys
6 SEP 2026 · 04:10 UTC
107 keys
93.1 keys
7 SEP 2026 · 16:07 UTC
109 keys
95.1 keys
9 SEP 2026 · 04:08 UTC
107 keys
93.3 keys
10 SEP 2026 · 08:08 UTC
109 keys
94.5 keys
11 SEP 2026 · 20:09 UTC
109 keys
94.4 keys
13 SEP 2026 · 08:08 UTC
109 keys
94.7 keys
14 SEP 2026 · 08:08 UTC
109 keys
95.1 keys
15 SEP 2026 · 20:09 UTC
110 keys
95.5 keys
17 SEP 2026 · 20:07 UTC
111 keys
96.4 keys
18 SEP 2026 · 20:07 UTC
110 keys
96.0 keys
20 SEP 2026 · 08:08 UTC
111 keys
96.4 keys
21 SEP 2026 · 22:09 UTC
112 keys
97.3 keys
23 SEP 2026 · 10:07 UTC
112 keys
97.1 keys
24 SEP 2026 · 10:08 UTC
112 keys
97.7 keys
25 SEP 2026 · 22:09 UTC
113 keys
98.0 keys
27 SEP 2026 · 12:08 UTC
114 keys
98.7 keys
28 SEP 2026 · 12:08 UTC
114 keys
98.7 keys
8 OCT 2026 · 23:10 UTC
113 keys
98.5 keys
Price history in numbers
106 readings since 25 Sep 2025
Over the last 30 days the Massed Flies Le Party Phantom's sell price ranged from 109 keys to 114 keys and is up 4.2% after 31 moves. Over a year it ranged from 84.6 keys to 159 keys (down 28.8%). Today's 113 keys sits in the lower third of its range: the lowest we have recorded is 84.6 keys (31 Jul 2026) and the highest 175 keys (25 Sep 2025). The price has moved 105 times since we began recording it — about once every 4 days.
Collector's Teufort Tooth Kicker