Thorichthys
Think I paid $8 each for them + shipping when they were young. I'd be good with $10 each or better would be to work out some sort of trade. Used T-5/compact fluorescent fixture, eheim filter, pH meter, etc. or fish.
Too bad you're not after the ceibals - I got them for a song when they were dime sized and am inclined to part with them for same. Pretty amazing red highlights starting to show on the fins - very similar pattern and almost as pretty as A. oblongums - be hard to tell them apart in the same tank.