Southeast Asian fossorials, and part of the tangled Haplopelma and Cyriopagopus reshuffle that has made this whole corner of the trade a naming problem. O. aureotibialis and O. costalis are the names that move.
Deep burrowers, fast, defensive, and carrying venom that is a genuine concern rather than a theoretical one. Give them substrate depth and expect to see very little. The gold banding on aureotibialis is sharp on a fresh molt.
Thai and Malaysian material moves irregularly, so prices swing with import timing rather than breeding cycles. That is a different volatility pattern than most tarantula genera and it means availability, not price, is usually the binding constraint.