However, I am concerned about the mileage of the acura. I know hondas can last for many hundred thousand miles.
Do not be worried Acuras are Hondas. Look on the back of the Acura Engine it will say Honda Motor Co. Acuras are much nicer since they are Honda's finer, richer, nicer line like Lexus is to Toyota and Infinity is to Nissan. The 99 RL looks nicer than the 02 Accord as well and if your grandparents offer 3k less for just 70k miles take it! v6 with more power you will appreciate it!