https://www.amazon.com/Cool-Living-Stand-Up-Desk-Black/dp/B0...
I'm otherwise pretty happy with it, but it's my home desk not my work one. If you're looking for a desk to use for full time work I'd recommend an electric or something with a counterweight or spring system to allow easier changes between sitting and standing.
http://iamnotaprogrammer.com/Ikea-Standing-desk-for-22-dolla...
I have another setup with an Ergotron Workfit (can be lifted up and down) but I find that the position is more adjustable with my mirror-screen version. With the Ergotron the position of the hands relative to screen is fixed so eye-screen distance can't be adjusted as well as I'd like. Also screen height doesn't go as high as I'd like.