http://www.awma.com/index.cfm/action/productdetail/product_id/12020.htm

Does anybody who knows anything about these think this would be a good investment? I'd like to work a bit on my grappling, and I'm a bit disappointed that this doesn't have legs, but it's cheaper than ones I've come across.

I think so...but century has ones without the arms for about half the price I think, and the armless ones work on your grip more so.

I'd think that something in this case would be better than nothing, if you don't have a partner. I have heard mixed feelings about them, but it might be worth a try.