Hello, I'm looking to order some VG liquids for my boyfriend who is allergic to PG, I already know of a few vendors who offer 100% VG but some of them are kinda pricey. For example, $9 for a 10ml bottle seems like a lot, esp since I discovered he's just as picky as I am about flavors so I don't want to spend $40 just to try 4 bottles. Any recommendations?