I'm still riding a two wheeler, but looking to get into a trike in a few years.
I'm considering the Boss Hoss, Honda Valk, and Triumph Rocket (my current two wheeler).
I've seen some lightly used, low milage BHs coupes go for under $25k, and that makes them very attractive. Generally they will be more like $35+, and that is over my price range.
There was a real nice red coupe that was repeatedly listed on ebay with dropping price down to $31,500. About 2 years old and low milage.
I wanted it, but not ready.
They seem to have more maintance issues than the Valk or Rockets, but Chevy dealers can work on them.
There is a very good forum for the BH's, although mostly for the two wheel verison, but engine same.
Rocket Trikes are rarer than the BH, and I don't want to cannabalize my Rocket as that is for my grandson. They go for just under $25k, and I actually like the BH better.
I'm in love with the Rewaco Rocket trike, made in Germany, and $47k(US) plus shipping. Not going to happen.
If you're not willing to travel much out of your home area, be prepared for $35k+, but if that doesn't turn you off. . . too much fun.
The Somerset PA link per above is just down the road from me, and they've have a top notch reputaion, for many years.
From my research, no 'bad' BH dealers, but Somerset turns them over pretty quick.