Those older resort boats do make pretty good mooching boats. The folks in Clallam and Jefferson counties seem to pick them up when they're available. But every once in a while, you'll see a few of them sitting around in someone's yard for sale.

Last bunch I saw was three years ago in the boat haven area of PA. The guy wanted $600 for them, which was a bit high. Keep looking; they're there.

Another option is to look at all the ads for older fiberglass boats with trailers and motors. You can pick them up for next to nothing fairly often. I bought a 16' Olympic with 55 and 6 hp motors (and assorted other stuff) from a guy for $1400. I parted the thing out and eventually sold the boat and both motors (separately) for $1800 and kept the trailer.