One of the problems with Yamaha's low-end keyboards is that they have no provision to recognize on-bass chords, which makes it hard to play modern music as written. Roland's entry-level boards always cost a bit more but had this feature. So does the tiny Korg MicroArranger (but factor in the cost of a full-sized controller.) A young/learning player should never be limited by the instrument so IMO, used is the way to go.