CBD Cannabidiol can cost anywhere from $0.04 – $0.20 per mg depending on the quality, potency and brand of the product. On average, CBD oil costs around $0.13 per mg, with low end prices at $0.05/mg and high end prices at $0.25/mg. Concentrates typically cost well below $0.10/mg and a 30mL tincture of 2000mg strength usually averages around $127 USD while a 500mg strength tincture costs about $60 USD on average.