My friend has that phone. Sony's Walkman interface is a bit tricky, but at least they don't use that stupid nub that most Sony Ericssons have.
It's cool, but unfortunately I have no money. I just used up my money for my Toshiba Gigabeat S, and my cell phone contract isn't over for another year or so. :/
Sorry. You could try Craig's List or some other places.