I just got this message from Essential Depot:
As of August 1st 2016 the price of Essential Depot’s 4 Gallon VG and PG GlyCubes are going up by a minimum of 13% (from $39.00 to at least $44.00). As a repeat customer I wanted to give you the chance to stock up and beat the price increases.
To order visit -> USP KOSHER Pharmaceutical Grade VG and PG - Drums and Glycubes. Glycubes only $39.00 until midnight EST Sunday
The upcoming Feb 2017 Federal E-Cig Regulations have caused a spike in sales to the 5000+ Vape Shops we supply. The associated demand spike across the industry has caused VG and PG prices to go up significantly. Our manufacturer and supplier is giving us one more week to purchase at our current price. Please help keep your price as low as possible by ordering at the current price before August 1st.
Thank you again for being an Essential Depot customer.
Seems legit, but part of me thinks they or their supplier are taking advantage of hype around the regulations.