How getting paid works with me shipping an item?

[whitehawktriple7]

Hello,

I have recently just sold my first item on ebay and am excited to recieve my payment. However, I was under the impression that I recieve the money, then i ship the item. But the man I sold to told me that his payment is pending and i will  recieve my money once i ship him the product. How does this work? The ebay answer pages aren't very helpful! Thanks!