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.