1997 has unmatched painting and may be involved in some kind of accident, it will be revealed by running a vin check.
1998 has replaced head gasket means had been overheated. Once overheated car may caused problem in future, not suggested to buy, most of the cases they will replace the whole engine once it had been in the situation of replacing head gasket.

Be careful with Spanish seller , the 2002 corolla, check vin first. Talk to a garage for pre-buying check up or a professional suggestion. They will charge you 20-50 bucks but will give you peace of mind.

Camry XLE has 3.0 engine and does not give good gas mileage. 2.2 - 2.4 will be better.

Do not rush still students are graduating and will be selling cars.

Find a friend who knows about car and you get a good one ( less problems in future) will save you time as well money.
Nick name of Mechanic is butcher, they jack up the parts price 2-4 times and most mechanic they want to order by themselves ( to make money ).

Keep looking, I like the corolla 2002 and the price sound good but spanish seller do buy and sell business. If they are selling others car then think of the reason to sell??
good luck Stopthewar!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!