Although you want to buy Qi, know that true Qi is hard earned and well worked for, so when you look back and remember that you are a 5th,6th , 7th dan, you will know how hard you worked.
This is just my opinion.
Like me, I bought Qi, but I had the skills since three years, soo I made it into Duck without problems, one guy even wanted to have sexual moments with me. ( he was obviously joking )