Try to buy BMW 525i 2006 8K mile and carfax back salvaged- look very good- what to do?

I recommend not buying the car. Salvaged means the car was recently totaled, flooded, or in some other manner suffered major damage. Then the car was fixed for whatever damage it incurred, inspected and passed by a DMV, then issued a salvage title. The vehicle was 'saved', hence the Word salvaged, but it was saved from going to a junkyard after suffering major damage. A vehicle in that condition with only 8,000 miles will be worth a hell of a lot less than a comparable vehicle upon resale.