I have bought quite alot from sedo lately.
Normaly they are listed around 2-3k, i post an offer ~150-200 and we end around 4-500 which is a fair price for most of them.
What I hate most, is all the retards that list the domains and forget about it - which means the bids expire over and over again.
I only had success buying 1 domain that wasnt listed for sale. Just did a whoise on the domain and mailed the owner
Most times they want insane amounts for the domains. Guess they still think all domains are being sold for millions like they watch on the TV