in the defense of Red, I've bought from him a couple of times, and he's been very reliable and prices very reasonable.
I know he doesn't do what he's been accused of doing. I never saw him buy from a forum member. He gets his stuff from local Amiga groups in the US, or collectors who quit and their sell stuff in bulk cause they can't be bothered to sort and sell them individually. sometimes drives long mileage to get them. I never saw him get something and pump it more expensive later.
Some of the stuff he sells appearantly he doesn't know what it's worth. Like those 2 meg A500 upgrades. He's more into 8 bits I guess, and maybe misguided by some ridiculously overpriced ebay auctions. After all it's very hard to put a price on this hardware since none of them are being made anymore (well some of them are being made, but they're not our concern atm) and everyone have their individual values for certain stuff (like for me I get an A500+ + 1mb chip exp anyday instead of the 2mb chip ram upgrade and also end up with ECS denise. but someone desperate to upgrade their a2000 could justify the price for 2mb chip ram boards.)
I believe what he posted he posted to help the seller sell his stuff, thinking it was a good deal for the buyer. I'm not sure if he implied if it should be sold for more or something. But then English is not my first language and I may be interpreting it wrong way.