I use to buy kratom from local smoke shops, but soon discovered that their products were pretty sub-par.  You can read this article to learn more about the risks of buying local kratom.  I have used Gaia, PurKratom, Happy Hippo and a few others since then.  Coastline is currently my go-to vendor nowadays, but honestly, a lot of the online sellers these days are pretty good.  Do your due diligence and you’re sure to find a good place.