The post sheds are typically more expensive, but the quality of materials is much better. I bought from a local company who specializes in sheds, and I paid slightly less than PWI, but when I compare the construction, it would have been worth spending the additional money. PWI used all pressure treated lumber on the bottom frame and flooring, and used 2by instead of 5/4 materials on the inside. I don't know where you live, but up here in MA we got socked by snow this year, and I was constantly out shoveling the shed roof so it didn't collapse. I didn't trust the cheaper wood to hold up. I guess in sheds, it is like houses, pay for better materials so it lasts longer, or replace it years earlier, and save a few bucks now. I think next time, I'll either hire a good carpenter to build it with the materials I want it done in, or I'll look more closely at a company like PWI who seem to use better materials.