Fli;
Some will be expansion but most will be replacements for older 88's and 9's as well as a bunch of RJ's.
These jets will be fine. They go to one of our contractors in GSP and a few other places and will have every AD complied with, they will get heavy checks and more checks that most line pilots know nothing about. When the come to DAL like other jets we have bought this way, they will be in tip top shape.
Heck once the airplanes get back to ATL, our Tech Ops guys go over everything twice. We do have an awesome MTC dept and never worry about the quality of their product.