...and do NOT underestimate this. I got five-piece batch (2 seats, 3 lids) a few years ago when silver was near its peak. I decided to experiment by breaking up a seat with clad coins (the mounting points were trashed, so I figured its intact value was pretty low). Breaking it with a hammer? Pretty darn hard. Put it in the freezer, tried again, and this time it worked -- launching shrapnel everywhere. I didn't get injured, at least not until I tried picking up the knife-edged fragments. Then I tried smashing individual bits with a sledgehammer. That works, but you get bent coins out of it. (Polished, too, as @SuperDave pointed out.) Also, more high-velocity shrapnel. Then I tried cutting up some of the bigger chunks with a Dremel (I think) reciprocating saw. Got the saw blade irretrievably wedged in the cut. Add the cost of a saw to the total. The plastic dissolves in acetone, or so I'm told. Buying enough acetone to do the job would cost more than buying undamaged coins. Bottom line (sorry): don't (pee) away your money on something like this. Unless your understanding of "Seated Dollar collection" is very different from mine...