2018 SLUR with 35,000 miles with the same issue. Dealer has been waiting on parts for a month now and says they should be in any day (I'll believe that when I get the call to come in). At least I have my Jeep and everything seems to be working, its just throwing the error all the time.
I know the seller's vehicle is only a few months old and the top is in pristine condition but I would imagine making a decent offer is not out of the question, but if you are looking for a bargain basement price, I know he won't go for that.
A black hardtop is about $1,600 and a paint matched top is $3,000. I think he is asking a pretty fair price for what is basically a brand new top and it has an LED strip light added above the back window. Sure, you can take a blank one and sand the crap out of it, prime it, have it paint matched...
I will be heading through Nevada next weekend and have the time allocated to spend the day at Valley of Fire on December 22nd. If anyone else will be out there, I would love to meet up and wheel with other people.
Update: trip canceled, had to let an employee leave for a family emergency