Not all CDB drops are created equal: I found the best

Organic, tested, and affordable: sunsoil.com - CBD 1200 milligrams in 60 ml = 20 milligrams per milliliter at $60. They had a sale in February at 50% off. I’ve used these for several months and they treat my chronic pain very well.

The other option is to buy either CBD-rich hemp (much more affordable) and make one’s own, for which there are plenty of resources online.