[dasboot]

Yeah, these are definitely cheaper. I remember seeing these and similar ones before. I think they may be below satisfactory for professional use, though.

The range is a bit limited (29-39 inches - too tall for short people sitting and too short for tall people standing, but fine for the mid-range of body heights).

Also, these things look a bit flimsy (no information on load capacity) and a bit awkward to adjust (seems like you have to loosen grips on both legs and then move up/down.

I didn't include them on my site, because I really wanted to present desks that can satisfy serious desk workers (like most geeks).

The DIY one looks like fun, I've built my own furniture before. I'll add it to my future DIY section.

The one with the plan is an interesting idea, but unless building hardware is your hobby, probably not so feasible.

I agree that the prices seem really high. I've looked around a lot for any DIY height adjustment mechanisms to retrofit a regular desk, but finding "desk grade" pneumatic cylinders in retail is pretty difficult.