Is my Reel to Reel worth anything?

Elliott.
Sorry but GOOD classic rock tapes are most definitely expensive in great shape.
To a collector that means the case and the label as well as the actual tape.
Sure I also bought dozens for under $10 too but you get what you pay for.
Pink Floyd?
Led Zeppelin?
Black Sabbath?

Be prepared to break out into a sweat.

R2R is exclusively for technicians or people with deep pockets; I'm a technician.

Not a technician and prefer to keep my pockets lined and the shirt on my back...lol.

R2R is for a very dedicated breed of audio enthusiast as it is definitely not plug and play and forget.
Even a cheap deck can be high maintenance and if something goes wrong as is prone to occur in a 40 year old piece of equipment then repairs are likely to vastly exceed any monetary value it might have.

If it is fully functional right now, it would still benefit from a recap, again more money unless you are very handy yourself.
They are generally very complex machines, even at the lower end of the price range.

Then of course as has been mentioned is the problem of good source tapes. Now they exist but be prepared to pay through the nose, $100+ for any decent classic rock tape in great shape.

Its your call but it can be a very expensive and frustrating rabbit hole to fall into!
Been there and done that!
Good luck and stay safe