It is for your casual use or for any other specific reason? Actually i have bought a standing desk just a month ago because of my backbone problem. It was not very comfortable, my suggestion is to go for a desk which have a seat merged with the desk. It feels more comfortable than any other. standbyyourdesk and TESCO is having good stuff and i have bought without any other shipment charges from first one accordingly.

Staples.

Ikea.....

I sa a blog post on this the other day, give me 5 min to check browser history.