Sorry I know this is old, but I'm working in Maine and have been to all three locations recently.
The prices are great, long C BE and circle H sockets for 40-80 cents, almost any screwdriver, a buck or slightly higher, I paid 4-8$ each for 6 S shaped Keystone adjustable spanners. They have fordson and a few other brands as well. These shops are literally a museum for sale. You'll find some garage sale stuff, but the overwhelming majority, that I noticed anyway, is 1960's and previous. Which makes sense, because Skip buys everything from estate sales and people have been on the east coast for a LONG time.
Hulls Cove Tool Barn is next to his home, and it's where he processes all of the tools. This is also the location he keeps the better tools. I didn't see any asian made cheap junk there. Everything was vintage American quality or hand forged. This is also where he keeps a very large selection of planes. They range in price from 6-10 bucks to 1k+.
The downside is, he is ready to retire. He has his stores listed and offers training in tool picking and continued assistance buying to anyone who is willing to buy the business and keep it going. He really does love his craft and helping the community but is wanting to take it a little slower than his 70 hour work week picking and cleaning tools and start writing more.
If you are in the area I would HIGHLY recommend supporting this business and if you know anyone with (iirc) about $6m laying around that wants to buy a few tool stores and inventory, let them know that there is an established business waiting for the perfect owner to carry on this legacy.