I found a piano, organ or something like an old digital piano on my grandfathers house, the name is Viscount F 50 The performer thats all i can read, I just want to know something more about it I'm planning on selling it, so anyone knows anything about it? or a place where i can find out?

This style of organ was manufactured in the late 1970's. I have one that I purchased in 1979. It sold for new for around $3,400 USD. It has a Leisle speaker system which is a system that spins the sound to create an improved reverb / vibration effect.
It was popular for it's preset functions and the Magic Cord and other cord functions.
A current value can be difficult to determine. The newer keyboards that are available today can do just as much and more, and are not too costly. Checking out the same or simular dated organs, the prices can range from $300 to $1,200 USD. You need to find a buyer who wants the standard organ look and sound, and not a modern keyboard. I am looking to sell mine and plan on asking $400 USD but am willing to come down in price if needed.
Good luck if you try to sell it. If you care to, you can keep me posted at cjcooley1160@att.net with the subject of viscount organ.