Buy from a longtime owner.
Buying a collectible car with low mileage from a little old lady who is the original owner doesn't happen very often, but keep that ideal in your head when shopping if you want to score an undervalued car. "Try to buy your car from someone that's had it for five to 10 years," Rawlings said. "Their perspective on value is much different than someone that bought it a year or two ago." And don't feel too greedy about it: Rawlings points out that less market-savvy sellers can still make a healthy profit from the transaction, even if they sell it well below what it's worth and aren't aware of its current value.