Colombian and Venezuelan dwarfs, and P. sp. 'Blue' has carried a premium for years on color that is genuinely present rather than a lighting effect.
Small, under three inches, semi-fossorial, heavy webbing, and quick. Undemanding husbandry and a good option for a keeper with limited space and real interest in the animal rather than the size.
Most of the genus trades under sp. designations because description work has not kept pace, and the blue form is the only one with any meaningful demand. That concentration is worth noting: the premium is on one label within the genus, and the other species sell for very little despite comparable husbandry and availability. If you want a Colombian dwarf rather than a specific color, the discount is sitting right there.
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.