Amazon.com has the Microsoft Natural Ergo Keyboard 4000 for only $28.48 shipped after rebate.

Item has a 4/5 rating from 132 reviews.

Pricegrabber Price : $33 ~ $82 Shipped

1. Click here and click "Shop" next to Amazon
2. Purchase from Amazon for $48.48.
3. Rebate Price : -$20.00
Final Price : $28.48 Shipped After Rebate