Ending today, Kraft Music via eBay offers the Casio Privia PX-150 Digital Piano with Matching Stand for $399.99. Check out via PayPal and apply coupon code "C20FLASH" to drop the price to $379.99. With free shipping, that's $89 under the lowest total price we could find for the keyboard alone. This 88-key digital piano features a two-track recorder, split and layer modes, duet mode, and USB MIDI.

Note: The coupon can only be used once per PayPal account.