Would you believe I used a Kodak Easy Share C913 9.2 megapixels to take these with? All I did was hold a 10x loupe up to the camera's lens and adjust my distance from the coin and snap, there it is.
I use a Canon ELPH 300 to take mediocre shots like these: Though I'm sure if I took more time I could get much better.
BTW, I got it with a bundle package for $179 on Black Friday, I think normal retail is something like $230
I think the lighting is more important than the camera in most cases. I can take some pretty nice pics with my Droid X phone if I can get the lighting right.
im currently using a Cannon power shot a560 way outdated, whenever i get close the whole screen goes blurry just cant handle it anymore.