I was in Temecula checking out Estate sales, 3rd house in very nice area, I asked if any casino chips, girl said no, then a man said I think Grand Pa has some. They looked in drawers and found a box. I asked what is price, they didn't know what was fair, I offered 5.00 they said would you go 7.50 I said sold. Not sure if I did OK, any idea of value?