Brooklyn Zoo has some skinny Apistogramma cacatuoides for $18.99(!) each. Aquarium Gallery has CPDs for $5.00 each & Puntius rhomboocellatus for $4.00 each. $5 is kind of steep for CPDs, but these were nice sized & without the sunken bellies most of the ones in stores seem to have.
Pacific has some very small Apistogrammas that I'm 90% sure are agassizi - the true agassizi, not A. sp. Steel Blue. I picked up 3 for 17.99, so in a few weeks I should be 100% certain which species they are. Petland in Brighton Beach has Congo tetras on sale for $1.99 each.