Last summers ACR had IIRC 15-18 Jeanneaus from 37 on up to 50'ish ft long, not to mention a number of beny's in that range too. Most are also sailed there on there own from France. Some arrive in good shape, others if they hit a hurricane or equal, well all bets are off.
You may want to look in the Caribbean as a lot of these brands are used in the charter trade, and can be had for a reasonable amount of money vs a non chartered boat.
As far as you taking one across the atlantic, i personally would not recomend it, unless you wanted to join the ACR, Atlantic Cruisers Ralley. where a bunch of folks take off at the same time, so you are with in ear shot of a number of folks.
There are plenty of boats able to do what you want.
She drives me boat,
I drives me dinghy!