[curiousphil]

The name is slightly phallic, but the concept is pretty neat.

Even after reading your FAQ I don't think I fully understand the service as a user. I pay a dollar to get the links of the item for sale and the place to sell it. How do you verify and charge me for a percentage of the profit at that point?

[mukeshitt]

The prices are known in advance. You can buy something for $X and sell it instantly at $X+Y. You make $Y profit out of which the site charges a percentage to give you the links to buy and sell the item.