Welcome!
You'll have better luck posting here as you stated you are looking for an SVT in the New England area:
New England forums
Gr8SVT is selling his ride and he's in Mass. PM him for more info. He's got a nice looking black SVT!!
Of course you're still welcome to post in this section anytime.
You're best bet would be to do some reading in the Duratec maintenance/performance forums, there's lot of helpful info there. I'd also recommend reading the stickies at the top of those forums (you'll see a red push pin). The aesthetics forum has tons of information as does the general mods forum.
Another thought for you, take the VIN number from one of the SVT's for sale on Ebay and have your insurance company give you a quote. You'll know what kind of $$ you'll be paying for insurance before you buy.
Good luck! And enjoy the CEG!