If a car has near 90-100k, find out whether or not it has had the 90k service (it’s the most costly of the all the interval maintenance services and this service includes the timing belt service (if it has belt instead of chain) — and I say, in my best Redd Foxx voice “it’s the BIG ONE”!) So, it’s important to find out whether this has been done or if you will need to budget and use this as bargaining information for the wheelin’ & dealin’. Ask them and also, if you pop the hood, you may even see a sticker around the engine cover, hood or frame that will indicate whether it has been done or not.