Act like a kid.
Register a new email address at live.com or gmail, timlikestheyankees@ or something that makes you appear young.
Send an email to the company that owns the domain, make it very laid back, again act like a kid. Say you want the name for a new band / a project / your sister's birthday and how much is it.
Make the email short and sweet, a lack of capitalisation and spelling will actually help here.
If its a domain theyve not had any interest in you should get an offer at a low price. If you sent an email all business like from a proper email account they'd try and ride you out for a higher amount. In their eyes some money is better than no money.
Worked for me in the past.
R