If you spend the exact same amount on a pre-made shed vs the materials to build it yourself, the one you build yourself will be of much higher quality (assuming you can swing a hammer). I went and looked at all the pre-fab sheds two years ago and for the size I wanted, they were in the $2500-$3K range. I looked at how they were build and just could not bring myself to spend that for the shoddy construction they typically entail. I spent the $3K and built it myself and have a vastly superior product.