Kratom vendors can easily be found on the internet. Many of them have a variety pack that you can buy to test a number of different types. Keep in mind some is good for a "morning burn" which means it is energizing and like a cup of coffee. Others are better before bed. Beware of the "enhanced kratom" or extracts - these are things that denote either extra strength from refining or extracting the active ingredients - you'll be best with plain leaf blends as the extracts increase tolerance etc.
We don't sell any extracts or enhanced leaf at Major Kratom because in the community there is a little bit of an ethical issue with it. The thought is that plain leaf is fine for effective use, extracts seem to only be important to the legal high crowd which will be disappointed anyway.