I just looked up the Rosewill 13003 on Newegg and Amazon. Too expensive compared to the Ergotron. Or better yet get an HP rebranded version for $82.99 on Amazon. That is nearly $50 cheaper.
It's ridiculous how much these things always cost. They practically cost as much as the monitor itself. The obvious reason for this is that it is a niche market. Not very many people want them, but the ones who do will pay these exorbitant prices.
$20 should be able to buy you the best. I blame all the idiots who don't want one.