My daily driver popped a head gasket the other night, so i am on the hunt for a new daily. I am starting to look into the toyota avalons. The years i can afford average from 1996-2000. Are there any known issues with the avalon that i should look out for? Im curious as to actual mileage, as i see from looking around that they average 21-30mpg. Also an idea on average expected mileage on the cars would be nice to know. I dont want to pick up a lemon so any help would be appreciated.