The Psr-520 - it's ancient (early 90's) but some of the sounds still hold up (the piano is way out of date)
worth it as a bang around and great as a midi controller (non-weighted)
I'm a Yamaha head I love the keyboards this thing is in excellent shape , sounds wonderful..I still won't touch your keyboard if it doesn't say Yamaha motif,Mo,Xf Xs..lolol perfect buy!!