Black Raspberry Flavor Concentrate
bickfords are said to be weaker flavorings.
Capellas are the easiest for a newbie to work with. Mostly mix and vape.
Inawera are also pretty easy to use
Lorann oils aren't oils (most of them anyway) and are a little trickier
The Flavor Apprentice are better after you have some experience of mixing 2 or more flavors together.
there are other labels, but that should get you started. Wizard Labs has the best pricing right now for small quantity flavorings.
check the forum suppliers (up there ^) and click on a few of the banners for the eliquid-type companies and check their offerings. Many sell PG/VG and base as well as DIY supplies like pipettes, gloves and little mixing bottles. I usually order 120ml base, 120ml vg for a couple of bucks and 120ml pg for the same couple of dollars to dilute the base and for testing flavors before nic is added, and am set for under $20 plus whatever the flavorings cost (usually twice the base hahaha). I don't like ordering gallons of stuff until I know I like the taste.
Have fun!