You do not need any 3rd parties to sell or buy a domain name. You can create
a buy/sell contract have both parties sign, buyer pays. You then create a NEW
account at the registrar then "Push" the domain name from your existing account to the new account/ Make sure that all the buyers information
is in the new account INCLUDING his email address then send him a detailed
email on how to login at that registrar with the set of passwords.
Warn the buyer that it is his responsibility to maintain the registration nad
the key to him not losing his new domain name is that he keeps a current email address in the whois record and that he checks his email regularly
Then send him the email and KEEP A COPY FOR YOURSELF ALWAYS
This will save your rear should he let the domain expire and blame it on you
