Posted by Huwbot,
©2003 LEGO Group
Today's random set is 4720 Knockturn Alley, released in 2003. It's one of 2 Harry Potter sets produced that year. It contains 209 pieces and 2 minifigs, and its retail price was US$20/£19.99.
It's owned by 1779 Brickset members. If you want to add it to your collection you might find it for sale at BrickLink or eBay.