It sounds like you want someone else to sell the unit for you.
I suggest you contact Echo Hi-Fi in Portland. I used them to sell a CD player and they were excellent. You need to ship the unit to them. They check out your unit, take pictures, write a description, place an ad on their web site and handle the entire sale (packaging, shipping, collection and payment, etc). They are highly recommended. There is a fee but, for me, it was worth it because I did not what to deal with buyers, packaging, shipping and payment.
Phone 888.248.ECHO (3246) or 503.223.2292 /
Email info@echohifi.com
Echo Hi-Fi
1015 SW Washington St.
Portland Oregon 97205
http://echohifi.com/about.php
Please review their web site for a list of items for sale and a list of items sold.