What kind of steaming pile of crap truck can you buy for $850? A lot of IDI owners drive a rig they paid $850 for?
Anyway, Jerry builds these radiators individually. No huge factory job. Just a small shop in Evansville, IN. Rip off? That rad is protecting the thousands of dollars of parts and work I put into my engine. It is keeping me and my family off the side of the highway when we are supposed to be enjoying vacation time together. Worth every penny for what I need a radiator to do. The only reason I'd ever have to replace that radiator while I'm still on the earth is if the truck were in a front end wreck.
If you just short trip or daily drive your rig to and from work and never haul anything significant, then buy the cheapest radiator you can find. For what I've invested in my rig and how important it is for that rig to NOT fail hundreds of miles from home with my fifth wheel and family with me... I need quality, not cheap.
Heath