What makes these two figures so enigmatic and desirable is that they did actually make it into adverts and flyers back in the 80's, but for some reason never made it into general release. They have reached mythical status for that very reason. But it now seems as if at least one of each of them escaped into the world at large. Here they are in an advert in White Dwarf 90 (numbers 5 and 11):
So there we have it, these particular hens' teeth do indeed exist.
On another note, what do people feel about pulled auctions/private offers? Personally I don't have too much of a problem with it, and I confess I've done it myself in the past. Judging by the number of requests I get to pull my own auctions, it seems as if there are a lot of people out there who don't mind it either! 99% of the time I turn down requests I get to pull auctions. Once in a while though, I do get an offer which even I can't refuse!