90k on a 99 2.5 dohc
No engine issues except for a leaking front seal. Yeah, it could blow a head gasket, but I'm not going to lose sleep over it. With that mileage you are looking at a timebelt change that really isn't as big a job as the shops like to make it out to be (did mine in the driveway).
Price sounds high though. Wait till Spring if you can.