I looked into something like this when I was fitting out my shed, I cant recall 100% but I though it was a little expensive at the time....I could be wrong, Ebay sounds as though it may be cost effective now....in the end I built timber shelves, I used the existing shed frame work and built of this and it worked out awesome....from memory I think it cost me around $200 for the timber and other bits and pieces....best part was a mate and I had a great couple of days building it and my work bench....maybe throw it up yourself.....