Check the front seats and make sure the springs haven't collapsed with age and use. Sit in them for a while and make sure they are comfortable. Mine were akin to sitting on plywood balanced on a marshmallow. If they are bad, you may have to replace the seat frames, or do the budget-minded pool noodle trick. I firmed mine up with pool noodles, and I am satisfied with them now. The process is described pretty well here if you do a search. Other problem area is water seepage around the rear window. Check for rust/water damage in the trunk. Its overall a nice car and fairly DIY-friendly.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma