When should you get an appraisal? 

 Some say every 3 years, others will tell you once a year and others will say "What?" There's no formula for having an antique car appraised, no specific timeline or other fixed date unless it is an investment vehicle. Remember, Investment grade vehicles are either #1 cars or extremely rare, highly appreciating autos. They are trailered to car shows or parked in static display in private collections.

These cars are not washed and waxed, they are cleaned and dusted. They are rarely if ever driven and are maintained where they reside. The frequency that you would appraise an investment vehicle really depends on how active you are in acquiring and trading.

As a general rule, it is recommended every 3 years. This is just maintaining your portfolio. If you buy and sell for a profit or as a profession, it's every time it changes hands or goes for sale. If you never intend to sell it, an appraisal should be done at the advent of any legal instrument such as the writing of a will, marriage, divorce, change of insurer and the like. An appraisal would also be in order upon completion of a major service or repair.