well i think its prob. Chaetostoma sp '4'. looks like it'll grow to look like this:
either way, at 5$ i dont think you've been ripped off lol. you in the us have crazy prices, theyre either dirt cheap or well expensive in comparison to me!
lol, its kinda hard to mistake from a front view it is one of the rubberlips. the top one you posted had weird colouring in comparison to the other two aswell lol. anyway, hope he does well