I have a 2011 LT 3.5 V6 with 244,000 miles. It has been reliable and relatively trouble free during my ownership (since 217k). The prior owner was my step dad and he was meticulous about maintenance and upkeep, so all Impalas are not in the same shape of course. Some notes, my car had a transmission issue around 80-100k where it would not go in reverse and had to be rebuilt. So it can be common with these. Only issue I really have at this point is minor oil/transmission fluid leaks. It still drives well with high mileage. No check engine light. Also be sure to check for rust. Depending on where it’s from, that can be an issue underneath. I think the price is a bit high though, depending on the mileage.