Best thing you can do is pay a professional classic car appraiser a small fee to have your car appraised. You'll receive an honest, fair appraisal. NADA, Manheim and others leave too much to speculation and guessing. Just because Joe Blow lists his 68 XXXX on craigslist for $XX,*** doesn't mean it's worth that OR it could be worth more! Is Joe Blow an appraiser? Probably not! Remember...there is NO PERFECT CAR. Every car has it's own uniqueness, thus it's value will be truly unique although it should be grouped reasonably with others of near identical features...apples to apples.