Getting rid of fish - return to store?

[LostMind]

My friend is buying a tank that is up and running... it's a 46 bow with a 6" tang, 5 chromis, 2 clown fish, 2 blennies and some other small fish.

He's asked for my help moving it to his place and setting it up.

Beyond swapping out the gravel in it for a new sand bottom and adding an extra powerhead for more circulation, I have told him the biggest cause for concern is all those fish. Problem is, how can you get rid of them quickly? They are actually in pretty good health amazingly. I was thinking a shop like JL's or king ed's but not sure if they'll actually take fish in? Anyone have any experience here?

The tank has a tiny algae problem and I bet it's caused by overfeeding/overpooping/too much fishes period.