It's a Mystery to Everyone Duck Billed Hatypus

✦ It's a Mystery to EveryoneUnusual22d ago

Sell price

177 keys, 54.33 ref

Buy price

154 keys, 41.77 ref

In keys

178 keys

In USD

$391.27 at the Steam key rate

Steam Market asking price

$977.50 asking, not sold

Community price on backpack.tf: 205 keys, last changed 2022-04-14 (4.5y ago). The live quote above, 178 keys, is 13% lower and last moved 22d 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: $977.50 — the lowest of one listing for the It's a Mystery to Everyone 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 177 keys, 54.33 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 Duck Billed Hatypus”, with no effect in the name — the effect comes from the individual listing.

Price history

32 observations

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.

It's a Mystery to Everyone Duck Billed Hatypus sell price, 2025-09-25 to 2026-10-12: 32 observations, from 206 keys to 116 keys.
Observed (UTC)	Sell	Buy
25 SEP 2025 · 03:29 UTC	206 keys	168 keys
30 SEP 2025 · 21:26 UTC	206 keys	169 keys
9 OCT 2025 · 09:08 UTC	197 keys	178 keys
19 OCT 2025 · 20:56 UTC	188 keys	169 keys
25 OCT 2025 · 17:18 UTC	179 keys	161 keys
10 NOV 2025 · 01:19 UTC	208 keys	187 keys
10 SEP 2026 · 16:08 UTC	173 keys	151 keys
11 SEP 2026 · 04:09 UTC	173 keys	150 keys
11 SEP 2026 · 16:09 UTC	173 keys	150 keys
12 SEP 2026 · 04:09 UTC	173 keys	150 keys
12 SEP 2026 · 16:09 UTC	173 keys	151 keys
13 SEP 2026 · 04:08 UTC	173 keys	150 keys
13 SEP 2026 · 16:08 UTC	173 keys	150 keys
14 SEP 2026 · 04:08 UTC	174 keys	152 keys
14 SEP 2026 · 16:08 UTC	171 keys	149 keys
15 SEP 2026 · 04:08 UTC	175 keys	152 keys
15 SEP 2026 · 16:09 UTC	175 keys	152 keys
16 SEP 2026 · 04:08 UTC	175 keys	152 keys
16 SEP 2026 · 16:08 UTC	175 keys	152 keys
17 SEP 2026 · 04:08 UTC	175 keys	152 keys
17 SEP 2026 · 16:08 UTC	177 keys	154 keys
18 SEP 2026 · 12:09 UTC	176 keys	153 keys
19 SEP 2026 · 16:08 UTC	177 keys	154 keys
20 SEP 2026 · 06:08 UTC	177 keys	154 keys
20 SEP 2026 · 22:11 UTC	178 keys	155 keys
2 OCT 2026 · 17:10 UTC	173 keys	150 keys
9 OCT 2026 · 23:10 UTC	117 keys	101 keys
10 OCT 2026 · 13:09 UTC	117 keys	101 keys
11 OCT 2026 · 01:10 UTC	116 keys	101 keys
11 OCT 2026 · 13:08 UTC	117 keys	101 keys
12 OCT 2026 · 01:09 UTC	115 keys	100 keys
12 OCT 2026 · 13:08 UTC	116 keys	101 keys

Price history in numbers

32 readings since 25 Sep 2025

Over the last 30 days the It's a Mystery to Everyone Duck Billed Hatypus's sell price ranged from 115 keys to 178 keys and is down 32.9% after 19 moves. Over a year it ranged from 115 keys to 208 keys (down 38.2%). Today's 116 keys sits at the bottom of its range: the lowest we have recorded is 115 keys (12 Oct 2026) and the highest 208 keys (10 Nov 2025). The price has moved 31 times since we began recording it — about once every 12 days.

Window	Low	High	Change	Moves	Readings
30 days	115 keys	178 keys	−32.9%	19	20
90 days	115 keys	178 keys	−33.0%	25	26
a year	115 keys	208 keys	−38.2%	28	29

Details

SKU	30700;5;u101
Last price change	2026-09-20 22:11 UTC
Key rate when recorded	63.78 ref

Same effect, other items

the effect across the catalogue

Item	Value	Updated
It's a Mystery to Everyone Prehistoric Pullover	145 keys	5mo ago
It's a Mystery to Everyone Neptune's Nightmare	85.4 keys	11d ago
It's a Mystery to Everyone Death Racer's Helmet	67.7 keys	14d ago
It's a Mystery to Everyone Hellmet	43.0 keys	17d ago
It's a Mystery to Everyone B'aaarrgh-n-Bicorne	32.6 keys	12d ago
It's a Mystery to Everyone Smokey Sombrero	16.1 keys	2mo ago

Other effects on the Duck Billed Hatypus

same item, different effect

Item	Value	Updated
Bonzo the All-Gnawing Duck Billed Hatypus	4,200 keys	11mo ago
Something Burning This Way Comes Duck Billed Hatypus	2,800 keys	11mo ago
Misty Skull Duck Billed Hatypus	1,050 keys	11mo ago
Amaranthine Duck Billed Hatypus	800 keys	11mo ago
Scorching Flames Duck Billed Hatypus	700 keys	11mo ago
Burning Flames Duck Billed Hatypus	460 keys	2mo ago
Nether Trail Duck Billed Hatypus	357 keys	3mo ago
Death by Disco Duck Billed Hatypus	300 keys	11mo ago
Stare from Beyond Duck Billed Hatypus	281 keys	11mo ago
Circling Peace Sign Duck Billed Hatypus	252 keys	2mo ago

Priced similarly

across the catalogue

Item	Value	Updated
Morning Glory Your Worst Nightmare	180 keys	11d ago
Smoking HazMat Headcase	176 keys	2mo ago
Serenus Lumen Tundra Top	182 keys	12d ago
Roboactive Ze Goggles	175 keys	15d ago
Fragmented Quarks Smissmas Saxton	177 keys	14d ago
Strange Hana War Paint (Minimal Wear)	176 keys	2mo ago
Ravenous Ravens Duality of Mantle	176 keys	3mo ago
Searing Plasma Co-Pilot	181 keys	1mo ago