I'm thinking about purchasing a 98 M3 sedan. Anything to look out for or ask the seller? It's silver on black and an auto, has 155k miles and supposedly has 10k worth of Dinan upgrades (intake, throttle body, strut brace, software, not sure what else). Car looks clean and interior in good shape but only $6500? Is it worth getting serious about it. What should I look for and be careful about seems like a deal. Any guidance would be appreciated. Check out the pic.