I have 1600 ft^2 of 4x8 panels I've decided not to use. They are mostly 4'x8' with a few 4'x4'. 4" of foam (r= 7.2/inch) bonded to 1/2" OSB on one face and 15# felt on the other face. No name, "factory seconds". I bought them cheap and will sell them to a fellow TFG member at what I paid for them: $20/4x8 panel. These have been stored in a dry barn since April. I can deliver within a couple hundred miles of Dalton, MA. for a very modest fee.