Better look this link:
http://checkpagerank.net/index.php?name=FX.NU&links=1
It is valid PR4 but not for index page, that is for inner page, that now don't exist, almost don't backlinks, so PR4 for this domain is useless
Only value is this is 2 letter domain, but dot NU is also useless so my seggestion is to take that 100$ for this and GFY.