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Phosphorous Whoopee Cap

✦ PhosphorousUnusual17d ago
Sell price
72 keys, 6.44 ref
Buy price
62 keys, 44.66 ref
In keys
72.1 keys
In USD
$157.90 at the Steam key rate

Community price on backpack.tf: 155 keys, last changed 2025-06-12 (1.3y ago). The live quote above, 72.1 keys, is 53% lower and last moved 17d 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.

Price history

24 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.

Phosphorous Whoopee Cap sell price, 2025-09-25 to 2026-10-06: 24 observations, from 156 keys to 125 keys.
Observed (UTC)SellBuy
25 SEP 2025 · 03:29 UTC156 keys127 keys
30 SEP 2025 · 20:23 UTC155 keys127 keys
9 OCT 2025 · 08:06 UTC148 keys134 keys
19 OCT 2025 · 19:52 UTC141 keys127 keys
25 OCT 2025 · 16:11 UTC134 keys121 keys
10 NOV 2025 · 00:12 UTC138 keys124 keys
22 JUN 2026 · 17:13 UTC120 keys104 keys
29 JUN 2026 · 01:14 UTC125 keys108 keys
5 JUL 2026 · 23:12 UTC119 keys103 keys
12 JUL 2026 · 22:44 UTC120 keys104 keys
19 JUL 2026 · 22:44 UTC125 keys109 keys
29 JUL 2026 · 00:45 UTC130 keys113 keys
3 AUG 2026 · 00:24 UTC135 keys118 keys
10 AUG 2026 · 03:11 UTC142 keys123 keys
17 AUG 2026 · 15:10 UTC141 keys123 keys
1 SEP 2026 · 04:09 UTC121 keys105 keys
8 SEP 2026 · 04:09 UTC70.8 keys61.6 keys
8 SEP 2026 · 20:09 UTC72.1 keys62.7 keys
11 SEP 2026 · 10:08 UTC75.9 keys66.0 keys
25 SEP 2026 · 20:09 UTC122 keys106 keys
25 SEP 2026 · 22:09 UTC72.1 keys62.7 keys
3 OCT 2026 · 05:09 UTC71.7 keys62.4 keys
5 OCT 2026 · 01:09 UTC75.0 keys65.2 keys
6 OCT 2026 · 19:09 UTC125 keys109 keys

Price history in numbers

24 readings since 25 Sep 2025

Over the last 30 days the Phosphorous Whoopee Cap's sell price ranged from 71.7 keys to 125 keys and is up 2.3% after 4 moves. Over a year it ranged from 70.8 keys to 142 keys (down 11.3%). Today's 125 keys sits in the middle of its range: the lowest we have recorded is 70.8 keys (8 Sep 2026) and the highest 156 keys (25 Sep 2025). The price has moved 23 times since we began recording it — about once every 16 days.

WindowLowHighChangeMovesReadings
30 days71.7 keys125 keys+2.3%45
90 days70.8 keys142 keys+0.3%1314
a year70.8 keys142 keys−11.3%2021

Details

SKU174;5;u63
Last price change2026-09-25 22:09 UTC
Key rate when recorded64.22 ref

Same effect, other items

the effect across the catalogue

Other effects on the Whoopee Cap

same item, different effect

Priced similarly

across the catalogue