Selling Meridian System

I recently just purchased a home with a Meridian System in it. We would like to sell the items- I know they are expensive but no idea how to much list them for! Can you all help me with a listing price? 

Here is what I have:
(2) DSP7200 speakers
(1) DSP7200 system Digital Surround Controller
(2) DSP420 wall systems
(1) DSP3100
(2) SW1600