I hadn't really thought about using Twitter to sell anything, but now the the idea is in front of me I like it. I think you could take the intergration with Twitter fruther, but I'm not sure I have the best ideas on how to do that.<p>My only initial concern was that in reading your footer text on your PSP ad (You can contact me on Twitter or email me....) I found myself looking for your Twitter handle down there as well and was confused that I couldn't find it. It actually took me a few seconds to realize it was up top. Would be worth knowing if other people are experiencing the same confusion.
Interesting idea, but the periods and commas in the example price are in the wrong order. Is it going to mis-format something I try to sell as well? Edit: apparently not, it's just a text field in the listing.