questionsanyone know a source for a inexpensive 3 monitor…

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i second monoprice. good prices and lots of variety

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I have started to see value in pvc pipe, it is cheap, easy to cut and assemble. Plastic pipe is like $5 for 12 feet and the elbows are $.50
I modded this for a display without a stand http://gaussmarkov.net/wordpress/thoughts/another-pvc-amp-stand/
for your 3 displays perhaps you could use this design.
http://hardforum.com/showthread.php?t=1552299
http://www.overclock.net/t/494272/project-triple-screen-mount

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@caffeine_dude: That design is very close to what I had come up with on paper except I was using a larger T joint that the smaller supporting pipe would slide through so you could adjust the monitors left and right, plus plus tilt. I was going to use a set screw to hold them in place once done.

I like this one as well though, may have to consider it.

Thanks.

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It isn't cheap, but I have had firsthand experience with Ergotron. As far as I know, all their multi-monitor desk mounts have the option of screw-in and clamp.

I bought their dual-stacking arm mount and it has served me well for the last 4 years.

They do have triple-display options, but not with articulating arms. Honestly, I would go with the dual and leave the other one on its original pedestal stand.