Acoustat x value


Not sure if this is politically correct, but can I get some opinions on the value of a pair of Acoustat x speakers with servo amps that are in very good condition.
128x128vtacoustatx
This may be the new way to sell equipment? I see a lot of these posts these days... 
I actually have a buyer, I was just trying to get an idea of what a fair price to ask.
My opinion.
If all is working 100% and in very good condition $3-5k for a collector. 
If not working at all and in poor condition $3-500. for a restorer.

Cheers George
Thank you, they are working great. Servo amps were overhauled and updated in 2009 by Ken Easley. Cabinets are an 8 out of 10. A few nicks but decent.