I don't get the love affair with the 8.1.
I owned a 03 2500 8.1 Burb for about a year and a half. Used it to tow my 7000 pound boat. Overall mileage was 9.84 MPG. While it was more stable than my 2011 Yukon Denali XL, the 6.2 in my Yukon is hands down better. Pulls better. Stops better. Interior is worlds better. And gets better MPG towing my boat than the Burb got solo.
That said, seems like a good price for the linked Burb, if that is what you are looking for.