Beer Bottle Caps...

You can also buy them in a liquor store or anywhere that's licensed for selling beer in your state. This way, you buy the cap, take them off yourself AND get a free bottle of open beer underneath!

If you're in the US, join one of the "Breweriana" collecting groups- caps are traded and sold by mail and at shows. Also, note for doing Google searches, the caps are also known as "crowns" or "crown caps"- the original name for the crimped-on bottle cap. Crowns can go for

IIRC, there are "chapters" in some of these groups that specialize in crowns. Note that some of these groups *tend* to be regional- so before joining one, check their "show schedule" if you hope to attend shows rather than collect only via the mail. Also, if you collect current crowns, most collectors want undamaged ones, so on "pry off" caps, don't use a traditional opener than dents the tops. Either put a quarter between the opener and crown or use a small screw-driver or other tool to "spread" some of the crimped sections open and pop off with your thumb.

Appreciate all that info, I bought the store and and learned not to crimp, I mean, by god "Git'er done". how 'bout it!