I go to Mexico once or twice a year, and I'm going back in 3 weeks. When I went in April, I didn't know about bullion investing but my father bought me a one ounce silver round from 1993. I searched it on ebay today, now that I'm investing in silver, and found it going for ~24 dollars. My dad got it for 20$, and I'm wondering if I offer to buy 10 from the guy, how much should I bargain it to? I know they get the silver right from the mines nearby, so I was thinking 150$ would be good? Or maybe less? what do you guys think?