I've never really been into mint sets. Picked some up and found this in the first one I opened. It seems to be a folded strip of cut off plastic from the packaging and is sealed in with the coin. Are/were issues like this common? Does it effect the value of the set?
It may bring an extra dollar or two but it has no effect on the coins. I have a mint packaged printing error and it didn’t cost me any more than buying the coins.
Happens decently regularly. I've actually found more sets mis missing or extra coins than I have with this extra plastic.
Most of the time I agree but in this case I wanted some mint sets so the holder is part of the package.
Mint sets are a good pickup for face value up to 1.5 face... 2 times face value for the right years and if you want to throw the seller a bone I guess that would apply to Proof sets as well.