Well, OK, the decision has kind of been made for me. My 360's disc drive only opens half the time, and the other half I have to stick a paperclip or something in there to open it. My Wii is modified, so selling it might be a bit of a gray area that I don't want to step into. And the PS3 is my brother's.
But even if I had perfectly functioning consoles, I wouldn't sell them.
I would only get £100 credit for my ps3 , so it's not really worth it and I'm only buying a PS4 not an xbox one so I will want to keep my 360 anyway. Now I just have to find somewhere to store my ps3 because I won't have the room to keep it hooked up.
If someone wanted to buy my broken PS3, I would sell it. I'm afraid to destroy it because it's always been good to me and I feel that wouldn't be fair to it. I can't spend the money to fix it either since the next generation will be here soon enough anyways.