There are only a couple that are left on the Cape. If I remeber correctly, The Baseball Shop in Orleans was really good. It is a stand alone shop on Main st and the owner was very helpful and willing to work with me. I have been to all of them that are left, and he was my favorite shop. Use this link below to get directions.
Find Baseball Cards Shops, Sports Card Shops, Trading Card Shops in Massachusetts
Set builder 1970 - now - Topps, Fleer (original), Donruss, Score and UD
Collecting all Tommy John cards not listed on my Havelist at my www.
Only able to ship on saturdays