The Official eBay app for iPhone updated in version 3.0.0

Pending the release of ‘’New search results’’, with this app you can buy and sell items, compare prices, and so on.

Henceforth the new version released brings: New and improved
look and feel; you can checkout multiple items at a time with the new eBay Shopping Cart (US and UK only).

You can also tap the grid icon at the top of search results to see larger photos (iOS 6 required)* and finally it includes:  Improved last minute bidding; selling support for Spain and Many bug fixes and enhancements.
Note: iOS 5+ is required for this update