I just bought a spiffy old Roland EP30 electric piano from Ebay, and its arrived, and I've plugged it in and several of the keys don't work. It also has a really nasty hum. Also several of the other keys aren't loud enough.

It says "The piano is approx 1980's and is in excellent condition." and also "“It is electronic with ten keys that need tuning.� Nowhere does it say "this piano is effectively unplayable and will need a good servicing to be used even just a little bit.

Anyone got any advice? should i have a go at the guy who sold it to me or just go straight to ebay?