Amazon.com has the Linksys DMA2100 Media Center Extender for $99.99 plus tax. It says $119.99 but when you add it to your cart and go to checkout the price drops to $99.99 due to a promotion for $20 off any Linksys product over $100.

You can also get the Linksys DMA2200 Media Center Extender with DVD for $129.99 with this deal.