Proof coins?

[never2late]

I know that there are probably lots of threads on this topic already, but quite honestly I am just too lazy to go look them up

Short and sweet, what are they and if they are valuable, why?

 

[lazooro]

http://en.wikipedia.org/wiki/Proof_coinage

 

[never2late]

hahaha wikipedia...of course.

Thank you sir