After seeing the following in a MaximumPC magazine, I was wondering, what's a PDA that I can get for cheap now (most likely off of eBay) that has a large color screen?

I'd like to use one to show walkthroughs for certain games (where I try to find all secrets) and other stuff, but I'm not sure which PDA would be the best. So far, I've seen a Dell Axim X3 for about $50 in working condition, but is there something better for the price?