Dynamat mark up?

[veltex]

Hey whats the deal with the Dynamat extreme, supposed to be the best stuff (or at least very good), in my area at least the 36 sq. ft. pack costs 180 at one place and 200 at another, their sugg. retail is 250, there a lot of dealers on ebay selling for 100 and some less, even with shipping your talking $115 to $125, I like to buy local but man. If a guy can sell it for $89, are my local stereo shops paying lets say $75 or $80 and selling for a $100+ profit? That sounds like the "Bonus Buy" program at one of my local grocery store chains, its a profit deal!