He wants a dh bike, not a rubbish heavy xc bike. An on one isn’t the answer to everything.
The wheels and cranks on that CBR will last about two runs of dh, if you are lucky. The OP would be better selling it complete to try and get some of the wasted money back.
There is a glory on sdh for 850, and big hits (fsr) from 450 to 800. They are quite old though and i’d want to look at such an old bike before paying out. Theres an old intense m3 too, and a few sundays. And loads of oranges, and SX trails (admittedly this isn’t a dh bike).
A kona stinky is not a good dh bike btw.
Have a look round, see what you fancy then maybe post up again to get some more advice. No more drunken ebay sessions!