What is the Best Silver Bullion to Buy?

Canadian junk is good too - dimes, quarters, half dollars and silver dollars have 80% silver, 20% copper, 0.6 oz to every dollar face value.  1965 and earlier. Apmex has some decent deals in pre-64 rolls. Some uncirculated. 100% with you on the practical "trade" value of dimes. If Silver's worth $200 an ounce, how do you get change for bread? (Of course unless bread is $50 a loaf! and could be) Coin shows could be good though, hadn't though of that. Thanks.