domain XXXFREE Need your idea about..

[Nam]

Xxx Free = 6,430,000

Hi,
This is not a domain for appraisals but I realy need your idea about domain extention value. Let say If you own the following domains:

xxxfree.info
xxxfree.biz
xxxfree.us

According to you which name will be more value than the others? if possible, please put your value for each domain. From this appraisal, we will learn a lot for the way to value a domain from .biz, .info, .us ...

Thanks for your comments

For more information for google result:
xxxfree = 492,000
"xxx free" = 6,430,000

Please

Please ....

 

[Nam]

Please give your advice. It will help a lots. Thanks