I built this wood base for a plastic shed about 10 yo. I just got rid of the shed and the base has held up surprisingly pretty well. Just needs a coat of paint. It's been sitting on blocks and was mostly protected from the weather by the plastic shed. Could be used as the base for a self-built shed or perhaps for a kids playhouse (how about a kids stage!)
Dimensions are 96" by 76".
It'll take two people as well as a truck/trailer to take this. Unfortunately I won't be able to help move it.