2007 International 9200i time to trade in?

I have a 2007 international 9200i with almost 900k miles. I already replaced the head and headgasket and the two turbos. At this point I came to realize the expense that I may come across moving forward. Do you suggest to start thinking about trading in the truck? Any thoughts appreciated. Truck is OTD truck. If trading it, let me know of a good truck to replace with. I heard alot about a freightliner (not sure what year) with detroit engine.

 

Yes it is a cat13. There some leaks here and there but overall its running good. I just thought trade-in while everything is running good for the next owner.

 

Dune-T you are absolutely right. Yearly truck maintenance is usually 15k per year average correct? This includes labor and parts.