If you are only buying a few batteries, it's not worth going wholesale, they will want to sell you at least 50.+
Buying wholesale usually requires a very large order.
Unless you're buying a huge ton of batteries, just go to RTD Vapor and get the best.
Or get into a Coop here on ECF. Get verified for the classifieds, then join a coop for the items you want. That is where a member joins with other members to place a large order with other people for many thousands of dollars worth of stuff from China, at a discounted rate due to the large order.