Check out Real Composition's beats depending on which beat license you're looking for. There's many beats for artists to lease, but the treasure of these beats is the Exclusive Beats!!
Check them out if you're into being the only artist/label with that beat. Though, if you want the best bang for your buck, the beast in in "Beats Leases" or "Track Outs/Stems" might be a good choice for you.
All beats in Real Composition's catalogue are 100% Royalty Free and allow Unlimited Revenue from streams, downloads, and/or hard copies of the tracks you make!!
And what more the Exclusive Beats, being exclusive and all!!