Buying in bulk helps a lot...if you have a market. I have bolts of weird cloth (impact, and others) stashed in my garage that are hard to work with but produce stellar results. I may have these for 12 to 18 months before I need to re-purchase. On the plus side, NOTHING made from petroleum that I buy will decrease in cost over the next few years. If the past is any clue to the present with this stuff, the price only goes up or stays stable.