Sam F. writes: I have a set of uncirculated US coins from 2 different mints. One of the mint sets has a second penny instead of the kennedy 1/2 dollar. Does this error impact value?
Yes, its worth less. I would have complained to the Mint. They beat you out of the best coin in the set! Packaging errors are fairly common and don’t seem to excite anyone enough to pay a premium for them.