Michael, I think it really comes down to whether you like and use the Exemplar. If yes to both, fix it. If no, don't.
Aside from that, if you intend on selling it, fix it. A machine which doesn't read discs loses more than the $200 repair at sale time.
Aside from that, if you intend on selling it, fix it. A machine which doesn't read discs loses more than the $200 repair at sale time.