I would be very surprised, pleasantly surprised for you or course, but I think they are star struck. I bought an Albin 25 on a trailer, with a Volvo
3 Turbo charged cyl diesel
and it was ready to launch for $4000. I use it regularly.
Let us know how it comes out. I dont know where you are so that may make a difference, but around here 20 foot sailboats are all over the place for under $1500.
If I could sell 20 ft sailboats for what your marina says they can get for it I would be wealthy just buying
all the $500 to $1000 boats I could get around here and reselling them. I am assuming that it has no mechanical powerplant..??