i suppose you should work out just how much he has saved you by helping you...does it run into the thousands?
obviously you should have been clearer with him, but then if he must known you had put them up for sale, and had prices for them, as he reserved 2, so he may still pay you...so wait a wee while to give him chance to sort it out.
did you offer them to him?
or did he just discover you were selling them and ask?
if you offered, i suspect he may think theyre a gift
unfortunately really only you can judge what to do as only you know if you would sound really ungenerous and cheeky if you asked for money...