last time when I asked them, here is the reply:
======================================================
Thank you for contacting 1&1 Internet.
No, it doesn't cost anything to change the ownership
of your account.
If you have any further questions, please do not
hesitate to contact us.
====================================================
> > Thank you for contacting us.
> >
> > In order for you to change the ownership of your
> > account please fill out the form Change of
Ownership
> > and fax it to (610) 560 1501
> >
> > The link below will walk you through where to
> > download the said form:
> >
> >
http://faq.1and1.com/billing/6.html
> >
> > If you have any further questions please do not
> > hesitate to contact us.
> >
=============================================
yoshiwara said:
if you push a name to another 1+1 account, there will be a $5.99 charge to you.
read the 1+1 threads about the 1+1 nightmare.
you can transfer a domain to another registrar but the buyer will need to pay the add 1 year transfer fee to the new registrar.