I ordered from here they got a deal for 2 gallons free shipping http://www.essentialdepot.com/category/glycerin-components.html .

Amazon for "regular" sized amounts. Search for Essential Depot brand.

Bulk Apothecary for bulk orders

Essential Depot is the only one i use for VG. Great prices and promos monthly after you join mailing list.

Essential Depot direct.. I just ordered the 2x1gal w/ free shipping. They called me this morning and said they have a vapor's deal also. Here is some codes they gave me to use also:

FYI10 (10% off the product price) SHIP20 (20% off the shipping price) You may select either of these codes to use with your order. Also, the promo codes change from time to time. These codes are valid at least until July 1st so this is a great time to stock up.

I get all of my supplies from Heartland Vapes. Good prices and good selection. You can buy bulk or smaller quantities as well

Essential Depot. They have sizes from Quarts all the way up to their 4 gallon glyCube for $48.00. Great customer service too.

Essential Depot and Bulk Apothecary are the two most popular places for bulk. However, I am leery of BA since they do not provide COA's or reference from where they source their glycerin (it's probably legit, but I like to know).

I bought mine from here. Their price for 1 gallon is $16.50. However, we all know shipping is the problem. If you buy from them through Amazon it is $27 shipped for 1 gallon. If you go to their site directly, you can put in your zip code to see if shipping works out better than Amazon's price. In my case, since I live 45 minutes from them, it worked out a couple bucks cheaper than $27. If you are in, say, Cali, you are better off buying through Amazon. Either way, it is cheaper than Essential Depot's price for 1 gallon.

Another possibility is here. They are $13.50 for 1 gallon and have a COA on their website. However, the shipping (for me at least) worked out to more than what I paid from Duda.

If you're looking for 55 gallon drums and up, you are probably better off going straight to a big distributor and bypassing all of these retailers.

Here's a suggestion if shipping a large bottle jacks up the cost too much: place multiple orders for smaller bottles and take advantage of the cheaper (or free) shipping instead. Of course, this depends on how much of a discount you get with a gallon vs, say, a liter, but it still ends up being cheaper in many cases because you're not paying a big shipping upcharge.

I recently ordered some stuff from TFA and decided to grab some VG while I was there. A gallon bottle jacked up the shipping price by quite a bit, so I added two liter bottles to my flavoring order, then placed a second order for two more liter bottles of VG. Saved me a good ten or fifteen bucks on shipping, and frankly it's easier to work out of the smaller liter bottles anyway.

Forpersonaluse? Amazon, Essential Depot. As stayed below.