If anyone in the US happens to be next to a Jerry\'s Artarama, I find their prices to be significantly less than Michaels even with the 50% off coupon applied (a gallon of Turpenoid, for instance, is $20 at Jerry\'s, while $50 at Michaels). Thankfully there is one a few miles from me. They only have locations in just a few states though, so if you can\'t go there, the coupon at Michaels is your next best bet =)