If they are legit (I am not an expert on these), I guess you can dictate the price as I don't think there are others selling them. But if its too high, it may not sell. How much were you thinking? I maybe interested in getting some.
Except the Acaras and Firemouths, you will have to upgrade their tank anyway. If you start with small ones, they will get used to each other and you will have time to decide to upgrade or go another direction.