To get rid of an item you no longer want you can either delete them or sell them in the gold and items exchange or you can simply gift them to someone provided they are not avatar body items (body items - like eyes, noses, bodies and mouths cannot be gifted or sold this way as you will not be able to send them as they are not giftable/sendable items)
OR, you can put them up for auction in the new AUCTION feature here
If you don't know how to start an Auction, click HERE

To delete an item - click on the tab that says "avatar" and you will see another option that says "avatar inventory". You can then put a tick in the box next to the item you wish to remove and then click on "delete selected items" to remove them.

To sell an item you no longer want to make a thread in the forum called "Gold and Items Exchange" Forum by listing For sale in the title and in the thread the item(s) you wish to sell and how much gOld you would like to receive for them and when someone responds favorably to your item and you agree on the price, then they can gift you the g0ld for your item and then you can gift them the item when you have been paid :How to send gifts

Make sure to lock your thread when your items have sold so others will know they are no longer for sale.

*Note: Do NOT upload unwanted or copied items to your user store and rename them. User store items are for items you create and upload to sell. Since sellers get g0ld for these items and they created them, and they are in unlimited quantities - it would possibly cause you to take sales for their items so we do not allow copying items and uploading them to your own store or selling items you purchased from someone else.