I'm sure you can find a reputable surveyor in NY to give her the Once Over. Here's a start...
The Society of Accredited Marine Surveyors (SAMS) - Members in New York State Marine Surveyors - New York - The Marine Surveyor Web Site MARINE SURVEYOR IN LONG ISLAND, NY & MARINE SURVEYS IN LI, NEW YORK
There are many here on the forum who can advise you on how to go about the purchase. If she's solid and ready to go, bring crew along or hire to come to you.....
Also, I would contact the seller for more detailed photos of which they should be able to provide. Do as much long distance legwork as you can so a trip across the puddle isn't a waste. If the seller wants someone to buy, then they shouldn't have any problem with getting you more photos and details...
Fish