if youre getting rid of them because of lack of proper housing, i wouldnt be concerned with money. didn't you get them for free anyway?
Free to good home with a tank 75 gallons or larger.
No comfortable with shipping.
If I "give these away" then who knows what kind of home they'd go to. ("I've done always wanted a big fish in a small tank" Says Cletus.) However, if I charge a nominal fee then that keeps people like that away.