The hull looks nothing like the Bayliner Buccaneer. The U-shaped stern is shaped totally different from the Buc, which is more wineglass-shaped and has a skeg at the bottom. I don't see 2 deck joints on the Buc, like this one has. The port lights are completely different. The top deck of the Buc looks nothing like this boat.
I'll admit that the deck of this boat doesn't look exactly like any Macgregor that I can find, but look at the hull, without that middle section. It looks very close to an older Mac 25 with the shape of the cove stripe, right down to the shape of the stern. I'm convinced that it is a modified Mac 25 with a section added in the middle to raise the deck, which was detached to make this work. There are 2 distinct deck joints, which the bayliner doesn't seem to have.
The boat I saw in our yard, which is exactly like this boat, has an inboard engine with sail drive. I wonder if that provides a clue.