This is a little different, but this got me thinking if many here have seen this before--
About a month or so ago, I came across a firearm on GB that I've been thinking about getting. It's somewhat common and still in production, so I'm not in a big hurry to get it. General price range for it is in the $600 +/- range. I spotted one on GB with a NR auction starting at $495. The seller had positive feedback, but not a whole lot, so I contacted him to get some reassurance, ask about box, papers, shipping, etc. He answered politely, and I didn't ask specifically, but I didn't get the impression that there were multiples of this item for sale.
I put in my bid, and no one else bids. It sits at $495 until 16 minutes before ending, when a brand-new user with no feedback outbids my top proxy bid (it goes up to around $525). I let it go, as I'm not willing to get into a bid war right then. Literally within 5 minutes the item is relisted with a starting bid price of $630! That ends up getting relisted a number of times with the price creeping downward slowly until someone finally bites around $565.
Don't know whether I got out shill-bidded the first time, but it made me wonder.