I've had a 2007 Yukon XL Denali for about 2 years now. It is in great condition for having 250k miles and I am replacing/fixing things as I come across them. I replaced my front struts last year with an ebay kit that came with the resistors to bypass autoride. They have worked fine. I noticed then when I was under the truck that the stock rear shocks had torn up airbags. I've been looking around for a while and decided to pull the trigger on rear shocks keeping autoride in the back. I planned on going with the Arnott AS2708 from Rockauto ($400 for the pair and $100 back when i send in both cores). I did some ebaying and found some for $130 for the pair with a 2 year warranty and a couple of good reviews. I'm cheap..which is why I bought my wife a 10 year old suv I could work on instead of having car payments on a newer one. Has anyone had any experience with the ebay air shocks? Less than half price seems almost too good to be true but I have had luck in the past with parts from ebay.