Sounds like depression!I don't think anyone would like to buy a domain with the word fail in it at all!!! which leads us to the second domain in your list.
I think you just registered the worst single dictionary word ever: failures.biz
No offence meant. If you're a real marketing shark, you could turn this to your advantage
As for the others, filed.mobi may have some value if the .mobi tld turns out a success, and privates.mobi kind of sort of sounds like a name, but has certain connotations that prevent me from giving it a more than regfee appraisal -- maybe a mobile image bank of people's privates? These days, anything may turn out to be a success...