Amazon has the Bosu 3D System Balance Trainer for $87.99 as their deal of the day. I’ve never seen this item cheaper than $99.99 anywhere and I’ve been watching it for a long time.
Also, I wanted to share that if you were considering buying the Super Mario Galaxy 2 that is being released May 23, 2010, that Amazon is offering it for $49.99 with a $20 credit on a future game purchase.
Oh, and here’s an important thing to know about pre-orders. Don’t wait until the release date to cancel your order if you find it will be cheaper elsewhere. They often ship several days in advance so that you will get them on the release date.