is this price in the USA ? A Tyros 4 for $650 is unheard of.
is it in good working condition. ?
If it is in good working condition, just buy it and worry what to do later . . . . you can re-sell it for 3 times that price.
However, it really seems too good to be true . . . .I would buy it only if i know the person selling it or if the person is reputable . . . .
thanks