I never have liked sedo because in the beginning they were extremely hard to get hold of and every domain name purchased (they were connected with 1 & 1, I think) seemed to be under a different "contract". I had things parked there and never figured it out, didn't have control, and on and on. However, I will say that I got a GREAT appraisal of the worth of a domain name I had (highlightertape.com). It was valued at $3000 because it was the name of the product itself, so having that assessment in writing really helped to sell it. The assessment cost me $60 at the time, but was well worth it.
I recently purchased the auction package at godaddy.com for something like $35 a year! in order to get ready to sell my old domain name windmillworks.com We have lots of interactive games at windmillworks.com/theawesomegamepage/ transferring all that is taking me a long time. (Hint, never name a company for romantic reasons instead of what the company does - unless you're google or yahoo). We never made windmills, but software! ANYWAY, Christin, take a look at godaddy. I haven't tried it yet, but I just don't like 1&1 which connected to sedo for parking, etc., never understood the interface. OH, and what I DO like at godaddy is the customer service. You can call 24 a day, 7 days a week for the website and get really helpful customer service. EXCELLENT. I don't know if their auction section is open that long, but take a look over there. Here's hoping your domain names have proven to be very lucrative! Whoo hoo!