Now that you've created your eBay store, you need to add some merchandise. Follow these steps:
Go to your eBay Store page and click the Seller Manage Store link.
When the Manage Your Store page appears, select List Items for Sale in Your Store and click the Continue button.
When the Sell Your Item page appears, select Sell in Your eBay Store, then click Continue.
Proceed through the balance of the Sell Your Item process, as you would when listing an item to sell in an auction.
That's right, eBay makes managing your eBay Store inventory almost identical to listing items in a regular eBay auction. That's one of the nice things about having an eBay Store; it's well-integrated with your other eBay activities.