I'd guess you can prolly try selling CPU+MOBO+RAM as a combo for around 150-180$ or less if they're really old I'd guess 130ish.
For the GPU it's placed around 100-125$.
You could try re-using the SSD or selling it for I dunno around 65-85$.
The cooler might be useless for anyone trying to just re-sell those parts as a full build for a bigger price, but I'd guess ~30$ isn't a bad price for a cooler.
Well, he's not local but I've talked to the courier service that'll be delivering it and I'm probably going to have to like test it out in their offices, just getting it off to boot would work right?
So I found an R9 270X Vapor-X, that someone was selling for way below the usual pricing for Europe.
I was just wondering if he had done something to it or used it for mining, but he hadn't. The stickers and cooler all look brand new.