Boats sales ?

Hello VI 

  I often vacation on the island of St. Thomas & I will continue to do so indefinitely.  That said I have been considering purchasing a cheap live abroad boat of some kind to keep out there in the marina so I could have it whenever I came out there instead of hiring a charter, etc. it just makes economical sense where I could even possibly take two vocations a year instead of one if I save on room and board. 

My question is ..  since I have been actively seeking looking for a vessel, I have noticed that not very much is available or the things that are available. I’m very high-end yachts that is not in my price range. 
are there more sailboats and lower and vessels available at the marinas that I just don’t see posted online should I make a special trip to come out there to purchase a boat while I have good luck? 

Thanks in advance for taking the time to reply.