[Stampsfan]

Best advice I received has been mentioned earlier:
If you see something you want for sale, buy it as it will disappear. I've picked up some really nice pieces, and have missed on things I will never see again by not following through with the purchase.

Best advice I have given:
If a seller makes an offer and the buyer doesn't take it, it's OK. If a seller makes an offer and the buyer doesn't take it, it's OK.
Both have the right to do so, without the other taking offense. At the end, both of you walk away happy. A deal not made is not personal.
We are not selling a kidney here.