amyvezz,

My suggestions would be (some of which have been mentioned before)

Build up your feedback either by buying some cheap items or selling of some cheap items from around the home.

Improve your description

Incorporate the postage costs into the selling price and offer "free post"

For a small extra cost offer an express post option so buyers have the choice of regular post or express post.

Extend you return policy to 30 days and define a clear returns policy.

Your little devils tracksuit listing appears to be against ebay policy as it sounds like you are offering a choice of sizes in the listing. Each size needs to be listed separately.

Be patient - it can take a long time to become an established seller.

Be careful about how much money you invest at this early stage as there is nothing worse than putting yourself under financial pressure.

If you have more than one of each item put them up for sale on gumtree as well - a lot of people have success on there.