You come out guns blazing by calling him a 'disgrace to the Corp.' and now you're crying because he called you a 'jerkoff'? Grow a pair. You don't know anything about him, his situation or his service; you're way more in the wrong here with what you said.
Anyways, OP, to your point - while others said you can move the production stuff easier than the custom, just keep an eye on whether the production stuff is still made. Certain models can be really hard to get if they're no longer made. You also mentioned that you got your PM2 for $80 - don't price your stuff based on what you paid for it, price it on what's a fair market price. If you paid $80 and the current price is $200, you selling it at $150 is still a net benefit for both parties.
This stuff's never fun, but hopefully it goes easily. Best of luck