I called about a leopard puffer local to me today £180 tho eek...
I think the only 4" fish I'm tempted to spend that much on, add a dwarf giraffe cat and some Congo tetra if not polys and would be n awesome tank.
Sometimes i look at the 300 and think how cool it would look to have a heavily decorated (plants/dw) peaceful community tank. Tons of little tetras, cories and what not.