How much can I sell this electric guitar for?

BetterThanThou

It's a Yamaha Pacifica 112V, the whammy bar broke off so it has no whammy bar and it'll need to be taken to a music store(or fixed by someone that knows how) before using the whammy.
It comes with a Yamaha GA15 amp, I believe I still have the instruction manual, a guitar tuner, 2 plectrums and two of the thick guitar strings, as the other 4 snapped and had to be replaced due to someone being careless and tightening the strings too much.
The guitar is more or less new, other than the broken whammy bar, I bought it no more than two months ago and I haven't played it much, the most advanced thing I've learned is how to play the riff of Smoke on the Water.
I'm also looking to a buy a keyboard, as having a keyboard is far more practical for me than a guitar, how much should I spend on it? I'm looking to spend as little as possible, but I want a full sized keyboard.