Philippine fossorials, with S. philippinus the species that circulates. Moderate size, burrowing, old world, and unremarkable in appearance.
They dig properly and stay down, so this is a substrate-depth animal rather than a display animal. Fast when disturbed, defensive when cornered, and about as interactive as any Asian fossorial, which is to say not at all.
Philippine export is restricted, so the market runs on European captive stock and periodic gaps. Prices hold through the dry spells. The genus placement itself has been questioned in the literature, which means the name on your listing may not survive the next revision, and that uncertainty is worth factoring in if you are paying for a species label rather than an animal.