I got a set of manually adjustable table legs for $50 and a used door for $5 to make into my desk at home. The manual adjustment is done leg by leg, so it doesn't work for periodically adjusting the height throughout the day -- what it's good for is if you just need an unusual height desk.
Some years back, I found that using a kneeling-style chair some of the time helped a lot. I couldn't use it all the time because then my knees would get sore!
If there's room in your office, you can add a cycle desk for about 5% of the cost of that elliptical desk. Only works with a laptop/tablet, not a full-size desktop+monitor+keyboard. It makes a GREAT break from the regular desk.
Sonoma County Library
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707 545-0831 x1581
From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Will Clarke
Sent: Thursday, February 07, 2013 10:10 AM
To: [log in to unmask]
Subject: Re: [CODE4LIB] Stand Up Desks
I got my anti-fatigue mat for $56 - http://amzn.to/14VqrJu
For a mere $4749.99 you can get an elliptical desk :)