I've been waiting for someone to take over where Ebay left off. Selling things doesn't need to be take that much time or favor the those with big shiny paid templates.
However, I really would like to see your marketplace transactions be free, allowing the seller to keep all the profit. If you did this, and just charged on the backend for payment processing similar to Paypal, I think you'd really be competitive.
As it is, theboxngo is cheaper than Ebay, but just by a little bit. If you want me to switch, then you've got to give me a REALLY good reason, not just a pretty god one.