car prices

can anyone explain to me car prices . austin healey sprite I can auction for £100.000 if I have upgraded it to S2 class. Some prices at auction house start at 10 million. Any answer’s. ???
Thanks Stan

You’re looking at rare cars that you can’t buy in the autoshow.

Seems you can go up to 20 million for everything if you’ve reached a certain level. I guess it’s related to the tuner and designer level but there maybe are other factors.