91B...What is it worth ?

I have a 91B. Probably made in '92. What is this worth ? 
   Also have an Etherwave signed by Bob.

   I would love to own either one, especially the 91b.  Couldn’t offer cash but would trade for other instruments.  I have collected many different instruments over the years but have come to Theremin late in life and love it.  Many guitars and other instruments of all types if interested in trade.  If not, good luck and hope the Theremins find a place to be played.
Have a great day

Sure, here's a concise breakdown:

1. 1992 Gibson Les Paul Studio (91B): Worth approximately $800 to $1500 USD, depending on condition and market demand.

2. Etherwave Theremin signed by Bob Moog: Valued at around $1500 to several thousand dollars, depending on condition and the clarity of Bob Moog's signature.

For precise valuations, consider consulting with a musical instrument appraiser or checking recent sales of similar items in the market.

phrazle