I'll just echo what's written above:
Extract your own and you'll know. Follow the steps you find outlined here. Take your time and don't look for shortcuts. If you do this and follow your tek to the letter, what you have will be 95%+. Take a few additional steps and you can bump that to 98-99%.
If you buy it, on the other hand, you'll never have any idea, and you'll be contributing to the commodification of the experience, which no one here supports. Extraction is an integral part of the experience. Take it seriously, put in the time and effort to do it right, and one of the greatest mysteries of your lifetime will unfold before you.