I picked up some very nice late 80's Jammy's plates from ebay for £15.00 each the other week...Pad Anthony and the like EX condition proper labels and Jammy's sleeves. In a few years I'll be selling these for £££ too!
Seriously though Laurent P sells alot of stuff through ebay and I think he's a nice enough bloke. That said this price is mad though as there are plenty of mad buyers on ebay he may well get a buyer.
Wasn't Laurent selling another slate (blank label) for alot of money a year or so ago and he pulled it after it's authenticity was questioned on this board??