So I used to be a big fan of eBay. I'm not so much anymore. eBay's fees are just crazy.
They charge you when you list an item. If you go for a $0.99 auction with a subtitle you pay $0.79 to list the item. When the auction finishes the buyer pays through paypal and you pay your final value fees. Paypal will charge a small amount and ebay will charge another small amount for a final value fee.
Your almost have to offer a low starting price (so people bid) and offer low postage (so people bid) on your item instead of other peoples. If your item sells for less than $2 you will probably end up owing money after you've sold your item.
I think I'm done with eBay. Check out this MUCH CHEAPER alternative: http://www.oztion.com.au/