If you are worried, would the next buyer worry too?
I agree with both statements above;
it's a sports car, so should be driven, and many drivers in and outside of the club, track their cars.
and, if it comes with a warranty, from an OPC, really you shouldn't worry, as that's what they are for.
What you're worried about, is has it been driven flat to the floor most of it's life and driven hard on and/or off track. That, no one will ever know buying any used car, unless there are obvious signs. I think by asking the questions in here, you're already concerned about it, and, just IMO, are already leaning more towards no, and if that is the case, maybe you'll always wonder. I know many a company car from colleagues driven like they'd stole it and I'd never like to be the next owner. But I also know many company car owners treat the cars like their own, it just depends on what type of Management owner/driver had it.
If it looks good, is what you want and will be covered for 'X' amount of time that will guarantee you no surprises (bar maintenance of course) then hopefully most fears may be over written.