Yeah, that still doesn't help much.
I had to look up fusion and I figured out it was part of Onkyo's series of components.
With what little information I have, and that this appears to be a component system (similar to Sony, Kenwood, JVC, and Pioneer of the same era) I'm going to give it a value range of $100-150 depending on the condition and whether or not you have the remote for the system.