because they're sold as garden sheds, not wood nailed together.

You can look in the classifieds for a shed though, you could get one of those old aluminum ones for really cheap.

right... so go getcha some wood and some nails and a hammer and go make your own... would have to be cheaper, right?.....you can even make your own doors!!.... you any good at making windows?... well, no matter, you don't really need a window.... vent would be nice , tho....

Money, money, money.

Darn rite they ARE expensive! Could never figure out why either. Was going to go in the silk flower arrangement business & needed a decent place to make them & display them too. Bought a nice 16x20 wood shed with a huge inventory of flowers & everything I needed for my business. Spent a royal fortune on it. Unfortunately the business didn't get off the ground, have stacks of arrangements plus a whole 16 ft. wall of unmade stems. They are now on Craig's list trying to sell the whole inventory. Bring in a truck & haul it all away!

Yes, but go check the price of all the wood involved.