Amazon is fine, but not the cheapest. Got mine from Flavor jungle. keep in mind, G and PG aren't going to last the same as that liter of nic you purchased. And, unless you are going 50/50, buying equal amounts is a waste of money. I purchased 1L of VG and 250ml of PG from Flavor jungle. Of course, I purchased a lot of other supplies as well, so shipping not that bad. If you pay attention to some you tube videos on DIY, they will mention flavors. Google, and you will find shops that sell everything you need (which is what I did).