Today I became a proud owner of an old ROM-based synth Yamaha CS2X. For quite some time I was in search for an as cheap and powerfull keyboard as possible that would replace my 25 year old dinosaur Casio CT-650.
To be honest, Casio serves me great as a MIDI controller keyboard, the quality of the keys are extremely good (much tighter/better then those on CS2X!) but they lack dynamics/velocity response.
Cosmetically it was in a really bad shape, but functioning-wise, still perfect! Well, almost perfect, one key (E#1) does not work, and another key (D1) has some nasty burn, but overall its really great! Knobs are perfect, which is another plus.