Essentials Depot has been added to my shopping list :-).
Look like for a 1x Gallon of PG + 1x Gallon of VG it comes to $54.95 w/ Free Shipping, which is a super-bargain when you compare that to WL and other vendors. The cost through WL would be $150.00 + Shipping for a gallon of PG and a gallon of VG since you'd have to buy it in 500ml bottles. Just to put pricing in perspective.
A gallon of each is quite a bit, but at the same time, if you DIY, chances are you experiment a little too so buying in bulk is going to cut your costs substantially as the cost per ML of PG/VG would then be negligible at $0.0074 cents per ML. Nicotine and Flavoring would then be the most expensive part of the deal, but if you buy 100mg/ml Nicotine, you'll be using more PG/VG to dilute, so you save there too.
I'm all about saving money, so if I can save, then I'm all for it. Using ED and WL, looks like the average cost of a 30ml bottle of 18mg (my current strength) is going to run $0.81 with shipping from WL factored in, so if we add flavoring (6ml), it still comes out to less than $1 for 30ml juice. You really can't beat that at all.
Throw in the cost of a bottle and it may run you $1.25-$1.50.