I only use DIY eliquid. Not for price, but because I'm a control freak, and I like knowing I control what I put in my body. I can easily control the nic content, flavor, stronger or weaker, and pg/vg mix. As with most people, I use around 80/20 pg/vg. That seems to be the most popular. However, I do think there is a big price savings. mcquin and most people pay about .50 per ml of ready to go liquid. I make my eliquid for under 5 cents per ml. Since I only make 4-8mg liquid, 95% of the cost is flavorings. Even if I made 24mg liquid, my cost would still be around 10 cents per ml. I vape around 6ml of 4mg nic per day, so thats around 180ml/month. So I save around $80/month doing DIY. Plus its fun, and you get to experiment. Yes you can make bad tasting batches, but cost is very low.