2016 USED COLUMBIA GLIDER WITH S 60 SERIES

Thinking of buying a used 2016 Freightliner Columbia S 60 Series with 480k miles.
500hp
10 speed eaton
3.42 gear ration
( Fitz glider)

My concern are the miles for a 2016 truck. Maybe I can get some advice?
I will do a dyno, compression check, oil samples, blowby test, air cooler leak test, check the frond end and fluid samples from the tranny and both diff's.
I had a realy BAD experience with a DPF truck so i said to my self NEVER AGAIN. That's the main reason why I'm looking at gliders but they are so expensive...
I'm trying to get this one down to $73,000, it was listed for $79,900. Truck is in Altoona, IA ( Harrison truck centar ) I've been in this business for little over 4 years. This would be my first s 60 series. Any advice would be really appreciate.
Thanks Martin

 

I think you are right but I can't find any better price on these gliders, all of them are expensive

 

I can't afford it, I can't do more then $70,000, any advice on what to be careful about this s 60 engine

 

From what they've told me the truck was build by Fitz, they did mention an extended warranty by TruNorth, nothing on how much, they would have to check the truck first.