Further to what Penny said, you can close your store any time you like. If it's only a short term thing it may not be worth paying the extra for a store. Plus, as Penny said, you'll still only be able to list 10 items a month (or whatever your restriction is) and your funds will still be held for 21 days by PayPal. You can call eBay to get your limit increased, but you can only do that once a month and they may not even do it for awhile until you've sold a few things.
If this is your first time selling, stick around here and ask any questions you may have. Don't go in blind. There are quite a few members with a wealth of knowledge. All the long term sellers here have made mistakes along the way and learned from them. They can hopefully prevent you making the same mistakes.
When creating your listings, good photos are important, particularly showing any faults the item may have, like a small chip or a pulled thread. A good description describing the item and mentioning any faults is essential. You really need to cover your butt these days as some buyers can be brutal. Don't forget to add a bit onto your price to cover eBay fees, incuding fees on postage costs if you are posting. If you are going to be using the auction option, always start at the lowest amount you're willing to accept for the item. Ignore any eBay messages saying to start at 99c. You always have to assume you will only get one bidder.
Good luck with it all and don't forget to ask questions if you are unsure!
