as for a buyers market, thats def the USA, full of boats and everyone needs cash. boats of all sizes are for sale cheap there since years. also Puerto Rico provides a large market for great prices and is well cheaper to bring the boat over, just a short ride over the Mona Channel, from Florida the transfer costs are to consider.
BUT,
do buy a foreign boat only if:
*** you do not plan to use it here commercially, because for that you would need to Import it and those hassles and extreme high costs for doing so make the cheap american boat market uninteresting/scratched off the list.
*** and if you are a US Citizen, to be able to do the yearly renewal of boat papers and keep up the amrican insurance, as a DR insurer will not insure a boat non-DR-Flagged
if you plan to use it commercially, sell diving and cruising and fishing tours, then only look on buying boats who already have DR Papers/Matricula, and make sure that the Matricula is Renewed to date and check at the Marina that no debts are on the boat. it is VERY IMPORTANT that the fabrication number/Hull Number worked into the Boathull(right aft) and shown on a Plate (inside front end of the boat where mostly the ankerchain is stored) is exactly the same fabrication number shown in the original of the Matricula AND on the Bill of Sale/contract, as a very high percentage of the elderly boats running in the country(all sizes from small chanchis up to big yachts) have false papers, changed flaggs from a foreign purchased boat by using the Matricula of a old already sunk DR registered boat. the authorities are on it to take those falsely matriculated vessels out of service/to the boaty graveyard one by one during the next years.
in case you are fairly new to such business on this Island, and plan to do " a lil bit" of boating and diving and fishing and snorkeling with tourists as a side biz, check your area where you plan such carefully before you spend a dime, as most likely it will just cost you a fortune and the new biz will be closed quickly. to own a boat is the least of requirements to run a biz/excursion on the water.
good luck
Mike