What you're looking at is an Army T boat. Just google
Army T boat and all kinds of stuff will come up. I almost bought one in Tenants Harbor Me. two years ago and looked at several of them. The one I liked would not pass a hull inspection
because steel was just welded over the old bad steel rather than cut out and replaced, and the frigging idiot poured concrete into the bilge
and raised the cabin
some six ft without an architect.
They are old boats and unless they have been looked after you could be in for some big expenses. They were specifically built for coastal duty and have deep narrow drafts so you will want to do some stabilizing if you take it out in blue water
Ones that are fixed up and in great shape are selling for around 250K, just to give you an idea what you'll be spending.
That said, they are beauties.
There's a guy in Maine
Hal Oates that brokers a lot of them, I advise caution in dealing with him.