Can anyone tell me about a Spartan 4900?

Hi folks!

Believe me when I say I don't know the first thing about vintage televisions!

My husband and I just bought a new house, and the owners left behind a ton of old stuff, including a Spartan 4900 console (projection tv, turntable and radio).

I have NO idea what to do with this thing! I'm not sure if it's worth anything or even how to find out. It certainly is a pretty thing, though. It looks in pretty good shape, just missing a couple of knobs. It even has a little pamphlet that I'm guessing came with it.

Can anyone help?

Thanks!