Digital keyboards have the benefit of a variety of sounds and greater portability, while maintaining the feel and layout of a traditional piano. Most have the standard 88 keys, though some are small and have less. Stage pianos most closely mimic the feel and sound of playing a real piano, while digital keyboards come with a great array of features and different available sounds. Weighted keys and hammer action are something to consider if you desire the feeling of a traditional piano. Size and weight are important factors as well if you are looking for a portable keyboard. Connection options like USB and MIDI may also be important to you, depending on your playing style. 

Looking a keyboard, electric piano, stage piano, or accessories for your keyboard? The Bbop marketplace has cheap keyboards and professional keyboards, new and second-hand keyboards, and keyboards near you - just use the filters at the right.