Yes, like you've mentioned Daily, there are keyloggers written in java which makes them 99.9999999999% undectable :/ So, if you see something called "z0mfgz0rs ub3r rs h@x0rz DL NOW AND HACK ZEZIMA IM THE ONLY ONE WHO KNOWS THIS AND YOU CAN, TOO DDDDDDDDDDDDDDDDDDDDDDD"
its good but u should always trust your gut
if its too good to be true and the guy isnt trustwrothy, trust yer gut and dont get it, even if it checks out ok.