I just met with my accountant a few days ago, and advised him I sold one of my Tigers for a bit more than I bought it for. I don't know how it works in the U.S., but here in Canada, we have to pay capital gains on any profit from the sale of a personal use vehicle. It never used to be like that, but the government saw that collector cars were appreciating, so they naturally have to grab all they can get along the way. In Ontario, we pay 13% provincial and federal sales tax every time a car changes hands, so with the value of Tigers nowadays, the government is getting the equivalent and more, of the original sales price with every transaction, and then they want their personal income tax portion for every lift in value. As well, every time the car changes hands now, the government requires an accredited appraisers value of the car, and the 13% is based on that value or the actual purchase price, whichever is higher. The days of fake receipts are over. If you bought it for less, it doesn't matter to them...pay on the appraised value.... What a great system for them!!! The Canadian government just loves the way the collector market has gone.
My accountant told me I have to carefully put together all costs incurred to buy the car, repair the car, sell the car, including expenses to go to the auction, if that's the way it is sold. I play by the rules, so will make the proper submission.
I only owned the car a couple of years, but understand the length of time you own the car is irrelevant, unless it is a quick flip, in which case they may not accept that it was capital gains. If you bought it in 1975 for $2,000, and sold it for $80,000 today restored, you're paying taxes on the difference less expenses. All that free sweat you put into the car yourself benefits the tax man. If you don't have your receipt, they can apparently deem the start value as $0.00....