Yep 100% don't agree with Ron's bid. The thing is though, trademe warns you when you're within 15% of reserve. (or at least it used to)
Ron has stayed underneath reserve, so perhaps he's just testing the water and not actually seriously offering $400. I've gotten curious before and done this myself.
I try not to do this anymore, otherwise it can inflate the vendor's sense of the item's worth.
"dsakey" on trademe. Apple II's are my thing.