Well as I said I bought it second-hand. I paid $1800 and another $400 to have it moved (3 miles, but complicated by the fact I wanted it nestled in the trees) and blocked.
The seller told me he paid $5500 for it several years ago. The guy who moved it said I got a very good deal on it (he moves and sells such buildings for a living).
I would think one could build something like this pretty easily, I don't know where you'd get the metal siding, but I'm sure it is available.
I'm happy with it because even with the tractor inside there is room to get to my gardening tools and workbench. When I got it home, I scrubbed it clean inside and out, painted the floor and put in the bench and shelving. There is something about a shed/shop - its my own little space and I like it in there /forums/images/graemlins/smile.gif