For all of us that are trying to turn our hobby into a business it never hurts to try something new. Etsy is the main online venue (that I know of) if you want to sell handmade or vintage items and supplies. I have also heard of Zibbet, Artfire and other smaller boutique websites. While these are all great sites to sell your items you will have a lot of competition. I have noticed that more and more people are opting to open their own online store.
With your own online store you can sell all of your items in one place. The only person you are competing with is yourself. There are no ads to other items (unless of course you put them there). You can also sell whatever you want. It no longer has to be a handmade or vintage item. You can sell Mary Kay or Tupperware. You can buy items wholesale and try to make a profit. Drop-shipping companies are also another option (that is where you list the items for sale but when a person places an order you place an order with the drop-shipping company and they send it to the buyer).
1 Shopping Cart can help you on how to sell online and open your own online store. From the ground up you can build your store by using one of their professional templates or creating your own. List all your items easily and quickly. Have products with different options like sizes, colors, etc.? No problem! Allow your shopper to pick and choose the options they want, see images of their choices and the price difference. Use multiple photos and views for each item and your customers can also zoom in just by clicking on the product picture.
You can sell anything from your products, services, digital goods and/or ebooks. You can even take it up a notch by offering Mobile Shopping. Now your customers can buy your items from anywhere. With your own online store you can sell anything and make it look just the way you want. Of course an online store is more of an expense but you never know it could be worth the investment!