Genus Birupes

Old World 1 species Birupes — commonly said as BY-roo-peez
Illustration © Mingo Xie / The Silk Ranch Birupes simoroxigorum

One species, B. simoroxigorum, and its price history is the single best case study in this hobby of what a supply shock looks like.

Described in 2019 from Sarawak, immediately controversial because Malaysian authorities disputed how the type material left the country, and it entered the trade at a price that made headlines within the hobby. Blue femurs, arboreal to semi-fossorial, old world temperament, Bornean.

Then European breeders got results. The price fell hard and kept falling, and it is now a mid-range spider. If you want to understand why paying a hype premium on a newly described species is usually a bad trade, this is the chart to look at. The animal did not change. The supply did.

Species
1
Live Listings
16
Family Typical Index
$60
median typical advertised price
Entry Price
$55
lowest ask now

The line on each tile: lowest ask per day.

Rarity BETA Rarity is supply, and only supply: the tier is how many sellers have ever carried a species, and for a single seller, how many separate listings. Price is not part of it, and neither is how recently it appeared. Tiers are given to tarantula species only.