I think the most expensive car in the game is more than $700,000 its a mercedes, some track racer, insanely fast. I think the best car for racing is the Chrysler me 412 its cool and drives real fast. You can't mod class a vehicles (most) because their stock engines are as good as the best tuned up engine and they can't get any better, the only performance mod you can get is NOS.
Which is worse? Being hole-punched to death or being eaten alive by the cast of "Friends"?