Most of the time it depends on how much available space they have and if it's a store that has the customer base to sell the kind of fish you're trying to get credit for. Where did you try calling today?
It's a bit of a drive for you, but Royal Tropical Fish and Bird Haven in Royal Oak has taken everything I've ever brought in there. Had to wait a little while for a tank to open for a couple of them (a big Oscar and a big Jag) but they took them within a month. They will definitely to give the low end of what you're looking to get there however. I don't see why they wouldn't take some small Julies from you.