The poster of that ad is relatively new to pinside, which doesn't necessarily mean anything, but you'd definitely want to be cautious. I'd ask for additional pictures so that you can see if they're "hiding" anything. Given that there's only one picture, and it's from across the room, it raises a flag. Perhaps someone who lives in the area could go have a look at it for you and let you know what they see.
Regarding price, I've owned this title three times. The last two I had in 2016 and 2018. I sold the fully working, nice condition game in 2016 for $2300 and the one in 2018 I sold for $2600 but it was very nice and it took FOREVER to find a buyer in both cases. I think Nascar is a really tough sell (at least in my experience) so they tend to sit when they're in the $2500 range and sell quicker at lower cost. While $2000 seems like a good deal, it's what I paid for the one I bought in 2018. It needed a small amount of work and needed to be shopped but otherwise was in good shape. The guy I bought it from had it for sale for a while before I bought it.
So, $2000 doesn't seem that crazy low to me but there are a couple of red flags with the ad (new user, only 1 picture, describes it as a "new" game) but with a bit of leg work you can quickly figure out if it's legit.