How about you leave such decisions to the staff?
I'll allow this, as long as it sticks to LEGO Star Wars sets and merchandise.
Personally I've done plenty of buying and reselling.
I made quite a lot of money on White Boba Fetts, the Visual Dictionary and some Star Wars sets found on sale.
It's been getting difficult lately though, as the Financial Crisis has forced several toystores to put sets on sale often.
And that's at 30-50% off which makes reselling nearly impossible.