I've been following your sales and I'm "curious" about your buyers, it seems they never pay you and you have to put the same article for sale again and again uh?
Same powerbook? again and again despiting there's no minimum price and there are various bidders?
It may look like you had created a second user to raise price and that's the reason you never sell it or offer it again later to the bidders at the maximum price they bidded.
example (same pictures, same description, sold for 130€, strange that the buyer didn't want it):
http://www.ebay.de/itm/ws/eBayISAPI.dll?ViewItem&item=140894140689&ssPageName=ADME:B:BCA:ES:3160
Of course I may be wrong, but it looks very suspicious and I have observed the same behaviour with Amiga items.
Please look at the offers in detail. It is a competely different machine with somewhat different specs. The first Powerbook is not paid yet (but will be in a few days), the next machine is different from that. The one you quoted above has no battery included, a smaller HDD, etc.
It is just to much for me at the moment.
It is the same with the handfull of A1200 I sold recently or at the moment. They are all different machines.
I do not push my own auctions. If items are sold for EUR 1,-, they go for EUR 1,-. Maybe look at my feedback, most of the buyers leave a feedback.
For the powerbooks I own: I offered them here for some time, but nobody wanted them, so I put them on ebay.