Only one way to find out, go see the boat, firstly make sure VAT is paid and ask for proof, even if you US flag it it will make the process much simpler, speaking from experience.
8 foot keel
on the east coast
of the US is not a good selling point. Ok for the Caribbean
but keep in mind the Caribbean monohull
market for older bene's is not so great.
It took us 4 months of very intense and non stop work, let alone the 10s of thousands spent, to get our boat up to a state of seaworthiness for ocean crossings (and structurally the boat was perfect).......
Just my thoughts: A $70K market price difference is probably not enough. Then again, this is from my perspective, which I have come to realize is different form everyone else's.
Whatever you do enjoy and have fun.