I actually haven't seen any in quite some time. All the store displays have been removed or abandoned.
Looks like the standalone PDA market is drying up in the face of smartphones, at least in what I see in terms of selling and product availability. They're just no longer in stores.
I gave up on the one I had, it's in a drawer somewhere. I got tired of having to restore it via clunky activesync whenever I forgot to charge it. The phone does everything it did, pretty much.