I took a flyer on this pack of three styli at Amazon because they were so cheap. I only needed one but a single stylus is typically priced $10 and up. So, I figured, what have I got to lose? As it turns out, nothing! I tried them out with Photoshop Touch on my Motorola Xoom just now and they work great. They make it much easier to make precise selections.
And I’ve got three of them all for a grand total of $1.23. It’s hard to see how they can ship them for that price.