SXT with that many miles? Nah, I would go for a limited or GT. You can snatch one in good condition around those same miles for around the same price. I would low ball them to 6k on an SXT TBH...
I just met a very unhappy Dart owner last night. He has a 16' SE. He purchased it brand new for like 18.9.. Today it's worth about 8k.. That's sad.. But the GT holds a little more value.
***To let you know though***
The Dart has a really crappy history but here is why: The 2013 Dart Aero. It had a LOT of problems out of the gate. Most are fixed now, but couple that with the ONGOING Manual trans master cylinder issues, you have a really worrisome time.
The SXT auto or GT auto is the way to go. The downside I will give you up front is that the 2.4L engine had a small batch that leaked oil through one of the cylinder walls, but that is kinda rare TBH. If you want to play it absolutely safe, you would want the 2.0L with the auto trans, but just to let you know, it's going to be basic as basic gets. I would go with the GT myself. If you find a Rallye, then that's good too. If you do really want an SE, I wouldn't pay more than 6K for it no matter how few miles are on it. It just doensn't hold value. You can swap some things out for stuff in the upper models but in most cases you are going to end up having more of a pain trying to get all the parts for any upgrade which can be expensive, but then you also have to do what's called a 'proxi' any time you add things to your car. And at the end of the day if you don't want to add 6 to 8k more to the car, it's just not worth it and TBH.. It would just be cheaper at that point to get a higher model.