I'm thinking the poster meant that it was $245 for the tablet and the stylus, but it is worded in a confusing way that makes it seem like the stylus cost $245.
If it's the HTC Scribe stylus that's designed for use specifically with the View/Flyer/Jetstream, it's awesome. I have one for my View. It doesn't work like a normal capacitive stylus. It's much more accurate, more like a traditional stylus on a resistive screen (without having to press down like you do on those). It only works with a few specific apps (although with the supposedly incoming Honeycomb update it will add support for much more), and you can't use it for general use (navigating the home screen, menus, apps, etc.), but if you're someone who needs to do some note-taking, annotating/highlighting documents, or drawing, it's fantastic.
. I wish it was the Scribe included instead, doubt I'll pay $50 extra for one.