
to CCF. You are talking about the SMS sets and they are very rare. You need to post photos of what you have so we can take a look. Chances are you have the regular mint sets. If you have the rare set you need to contact some place like
Heritage Auction house and if you have the regular set the eBay is your best bet.
John1

( I'm no pro, it's just my humble opinion )
Searched 5+ Million Cents Since 1971