You are looking into a Lexus es300 98 model with 90000 miles on it you are also looking into a Camry 97 with similar miles you were wondering how maintenance cost on the Lexus is going to be compared?
As the Lexus is Toyota's premium brand the parts to repair a Lexus will be more expensive than the same parts for a Camry. But the Lexus is one of the most reliable vehicles you can buy. At 90,000 miles the Lexus and Camry both have many miles left before they need any major repairs, assuming they were serviced regularly. Look closely at each car and see if it appears they were taken care of. I would pick the Lexus over the Camry although both are very dependable automobiles.