You are right. I checked the value (using trade-in value) on the KBB site and there is a $6,000 difference between the Acadia SLT and the Saturn XR. This, in the SE Michigan area.
Frankly, while things are fresh in folks minds on "no more Saturn", this difference will exist. I would not lose sleep over this. I think, over time, this difference will diminish. I didn't buy it to sell it...right away. As long as we are not "chasing" our vehicles due to water leaks, power steering noises and tranny issues, drive 'em!! If we occasionally need warranty work AND the service is there to perform this correctly the first time, I'll be a happy camper. I've got just under 4,000 miles on mine and everything works...no issues. This vehicle is right for us. Quiet and tight. I just checked my DIC tonight and she's right at 17 mpg running around town. I'm still impressed that a nearly 5,000 lb vehicle delivers this kind of mileage and load carrying space.
In God We Trust!