[BobPalmer]

For mine, I knocked together one out of plywood (3' x 6') and 2x4's for supports and shelving (basically a pair of framed out stands 20"Wx30"Lx42"H)for about $50. Then added a nice anti-fatigue mat from Amazon, and picked up a nice Drafting chair, so I can easily go from standing to sitting (and tend to change position every half hour or so).

Best part is that I was able to precisely size it for my home office, and have it at exactly the right height. Took a bit of getting used to, but it's one of the best investments I've made. Only issue now is that my window AC unit only keeps my feet cold, since the desktop is a few inches higher than the AC unit..