My guide to the pre-purchase inspection process for a classic car purchase. This is the most important investment you make before you write a check.

Hire an independent inspector who specializes in the make and era. Not a general mechanic — a specialist. Pay the inspection fee without negotiating. It is far less than the cost of the mistakes you'll make without it.

The inspection should include: a lift inspection of the undercarriage and frame, a compression test, a vacuum test, an electrical system check including all lights and accessories, a road test, and a visual inspection of every panel for evidence of previous damage.

Request the inspector's written report before the seller's deadline. Any seller who won't allow a thorough inspection is either hiding something or doesn't know what they have. Both situations require a price reduction.