Best prices on Yamaha 88 key digital piano in Musical Instruments & Accessories. Check out BizRate for great deals on Musical Instruments & Accessories from . Use BizRate's latest online shopping features to compare prices for Yamaha 88 key digital piano. Read product specifications, calculate tax and shipping charges, sort your results, and buy Musical Instruments & Accessories with confidence. Easily narrow your search and find the product that's perfect for you: Yamaha YDP223 88-Key Digital Piano - Yamaha YPG-635 Portable Keyboard.