hi.
try to offers your domains at sedo with the "BUY NOW"-option.
then you has the possibility that you sell maybe too over a corporate domain-registrar same as godaddy.
its not possible by auction-price, but a "BUY-NOW"-domain at sedo is offer at godaddy and other corporate registrars too.... depend of the tld (for example dotUS or dotPT is not possible, but each dotCOM).
the "good" point ist, thatt you can offer your domains maybe here private in gfy-community.
before sedo is going to complete a deal, they are going to proof if you are the actual domain-owner.
but to be sure of their rulez, its better you visit sedo and read their rulez.
i am offering there actual +./. 60 domain (ago over many years more) BUUUUUUT never i sold at sedo.... private in communities same as gfy is better (my experience).
but you can park your domain at sedo. and you earn peanuts with each click :-D
i am parking there only dot PT-domain ...
www.deo.pt /
www.etv.pt /
www.xtv.pt /
www.tvx.pt /
www.geni.pt /
www.kento.pt .
NOT for the click-peanuts ... its only to make them "public" until the day i am going to work with them