Well, I've just checked the phrase "apps for android" and has 6,120,000 of global monthly searches, so your domain "findallapps" would cover that subject, now I must tell you that I'm not in deep enough in the subject as to know if there is enough information (content) around the term apps as to justify the creation of a site exclusively for this, although I'd think so according the global searches around this subject
So I'd think worth to hold it or sell it for a right amount I'd think in the range I mentioned but of course just my 2 cents