I have not tried Godaddy auctions yet. What does it require to list my domains there?
You have to buy a yearly membership to join their GD Auctions which is $5 per year in order to list your domains.
You can use one of their % off discount codes and get it for a little less than $3.50.
It's ok and sometimes you can get real good prices. They have a large amount of people looking there so sometimes you can get a good price.
You don't have to list them as an auction (even though it's called GD Auctions) but also as a "Make an Offer" listing.
They are good but it all depends on the type of domains that you are selling to determine which is the best place.
Cheers, Dean