If anyone out there is into the Lego Mindstorms Robotics Invention System (the one that lets you design, build and program your own robots,) then run, don't walk, over to your local BestBuy for a really hot deal! I was just in BestBuy this afternoon and noticed that one of the expansion sets, Robo Sports, had a shelf placard for $9.99, even though the box was stickered at the regular $49.99 price. Figuring that the placard was wrong, but that I might be able to haggle the manager into honoring it, I took it up to the checkout. Surprise; the placard was wrong - it didn't ring up at $9.99, but at $4.99! Smelling a real kill, I rushed back and picked up one of every Lego Robotics expansion set they had and made the checkout clerk scan 'em all. The Extreme Creatures set also rang up at $4.99! All the other expansion sets were normally priced (in the $50 to $100 range) so I nabbed one of each of the $4.99 sets. Even if you already have those sets, just the extra pieces are worth more than $5!