Tell him that you are not afraid of flying up to NH and suing him civilly and reporting this matter of fraud to the NH Attorney General's Office
Here's their address:
33 Capitol Street,
Concord, NH 03301
Tel. (603) 271-3658
Fax (603) 271-2110
http://www.state.nh.us/nhdoj/
To file a complaint:
http://www.courts.state.nh.us/district/claims.htm
Here's some info from their Dept. of Justice:
WHERE TO GO IF YOU HAVE A PROBLEM
The laws applying to used car sales can be difficult to apply and the examples show the difficulties in interpreting circumstances. Contact the NH Consumer Protection & Antitrust Bureau if you have a problem with a used car purchase.
NH Consumer Protection & Antitrust Bureau
33 Capitol St., Concord, NH 03301-6397
271-3641
If you believe the Buyer's Guide rule has been violated, contact the FTC.
Federal Trade Commission
600 Pennsylvania Ave., NW, Washington, D.C. 20580
1-877-FTC-HELP or 1-877-382-4357 (toll-free)
TDD: 1-202-326-2502
The Better Business Bureau may also assist in mediating or arbitrating a dispute.
Better Business Bureau
410 South Main St., Concord, NH 03301-3459
1-800-955-5100, or 224-1991, 228-3789 or 228-3844