Annoying and costly...
I Totally disagree with Mark, and a few others here, outing an auction is not sharing "knowledgable" information. It's not telling me anything informative about the poster(age, release, type of paper, Print quality, etc) it's simply telling me where something is for sale.
The more people that Know, the more it will cost. Why spoil someones chances of a good deal for the "glory" of letting people know what you have found. Do you outers just want the pat on the head, well done son, your fantastic at sniffing out the bargains.. And if as some have said, all the serious collectors will know about them anyway, why bother telling us on here!! as we will know.
This whole outing subject is about money, full-stop. Why should we take the chance of paying more, just because these gob-shites want to feel they have achieved something.
Well how about we all post every poster we are going to buy before we buy it.. I wonder how many will post, as I may run you up just for sport.