Is there a need for cinema. Speaker from theaters

It depends on what models of JBL, and age and condition will affect price. You can check ebay to see if there are similar models that are selling. Some are known to do fairly well in the home and will sell at the right price.

Pro audio and theater audio can be as good or better performing than audiophile products. 

Yes, there is. 

Depending on what you have, you might want to sell to a dedicated theater installer. They are out there. 

JBL professional drivers are pretty expensive, and so even on the used market they command a pretty good premium. My point is, if you cannot sell them as a system, you might be able to part them out and sell the components. 

You might even want to reach out to Kenrick sound. They have a thriving JBL restoration business and may make you an offer or give you some great ideas. 

Best,

E