Yea there is a market for people like me who want the engine and generator cheap but outside of that, I don't think so.
The problem is this is another "I paid $XXXXX for it and put all this money into it, and after having it for 5 years with 60000 hours on it, it is worth a little less than I paid for it" attitude. It is a tool, it is like a reefer unit which loses a lot of value due to the age and usage. The resale value of the APUs are propped up by the fact that everyone wants one but that means little to the guy who bought someone elses problems.
I think of it like other truck parts, took boxes for example. The guy has a beat up old box which is worth $50 scrap value, no door or the door is beat up on it that it needs some patching. But because he paid $700 for the thing, it is worth $300 to him.
Well back to the APU...
Parts wear out, and unlike a reefer unit (there are only a couple of manufactures), parts are not off the shelf stuff (controller boards) so if you can't find the right servicing or the right parts, then you are kind of screwed. I know some manufactures listened to their users others watched while APU owners struggled with some issues and they are using off the shelf stuff that you can get anywhere. There are various layouts but they are basically all the same - engine, belt driven compressor or generator.
by the way I can get a used reefer unit ($700 works) cheaper than I can a used APU unit ($1100 that may not work).
I think I been sitting in the sun too long
