Oh definitely I have had some bags get away. A few months ago a PFer was actually returning a red caviar jumbo to her store and I know I was the first to PM her requesting the return info. She gave it to me and said she would be returning it a few days later, so out of courtesy I waited because I didn't know if her SA knew about the return and I wanted everything to be on the up and up. What I didn't know is that the PFer gave the return info to several other PFers and it was snagged because I waited till I got word that she had been in the store to return it.
I'm trying not to be bitter, and trying to convince myself that I will find this bag in lambskin (which I prefer) someday...
Also, because I hesitated, I missed a black PNY flap on ebay which had a buy it now just a few days ago. I'm still mad at myself for this.
On the flip side, I just jumped on something that was one of my HGs even though it was WAY over retail and I have absolutely NO REGRETS because I'm in love.