yeah I thought so too.
They had a Y reg Sport, exactly the same, but with 16k miles last week.
I took it out for a test drive, and was ready to buy it, when the sales blokey says "sorry, we should have told you, but it's going to Lexus auction tomorrow. I can't sell it to you, so you'll have to wait to see if it goes in the auction". Apparently, they had had it up at £17995 because of the low mileage, but it hadn't sold, so they dropped it to £15995, and then decided to put it into the dealer auction about 20 mins before I had called to arrange the test drive.
Unfortunately it went to another dealer in the auction, but I spotted the one I ended up buying, and its only 4 months older.
Daz