Chipper,
Elroy (Bob) hit it on the head. Go to BFC on route 1 in Woolwich about a mile north of The Taste of Maine on the left and talk to Glen and Howie about the boat. They may have been the ones who sold the boat originally and can give you background on it as well as advice on what to look for. If possible get the boat to them or one of them to the boat for a look.
It does look like the Coasties are finished up here on the river as it is clearing out rapidly now. Bowdoinham will follow shortly. The 186/190 is one of the few boats you'll feel comfortable about getting into and out of that little hahbah in lower tides.
I hope it's in good shape and you're able to get it. It's ideal for the river and several miles off shore in decent conditions. I'll be happy to answer any question about my experience with ours if you wish.
Dick