The most popular sites are
OneStopDIYSHop
DIYFlavorShack
For additional flavors -
Flavourart - Liberty-Flights.com and FreedomSMokeUSA and I think PureVapes carry some
Lorann's - ShopBetty's and Tasty Vapor carry and you can find on Ebay too and in some Walmarts
Perfumer's Apprentice - check their own site for all of their flavors and notes on which are vapable
And there are others. But it is all in the guide in the DIY section of this vforum. Go read the guide and always consult the lists and any other available info to see which flavors are safe for
vaping. Some contain chemicals that should not be vaped. Some are oil based and hard to mix. Etc. Don't
buy flavors without research.
DIY e-liquid