Should I buy a 2008 honda civic ex-l that has 100000 miles or a honda civic lx that has 82k miles?

The honda civic ex-l has only one owner and the honda civic lx is from a dealer. They're fairly the same price

If they are the same year in good condition, I would suggest the one with lower mileage.
But if the accessories and features of the EX is important to you then just get that one. 82k - 100k is not much of a difference and still low for a Honda, but average mileage is 12k per year, they are both used more than average.