Australia is 40 free listings per calendar month for non-store owners, with 9.9% FVF on sale price, so not on postage, with a $250 cap. The listing can be any format (auction or BIN), and in almost any category (some exclusions apply, eg motors, classifieds). Insertion fees after the free allocation is used is $1.50 for a listing up to $100 (including multiple quantity where the combined value of available items =$100 or less), above that is $3.50.

A shop can be better value depending on the kind of items you sell, what format is best for them (BIN vs auction) and how many items you have. Each store package has a number of free listings included with the package, but they need to be either fixed price, or if an auction, in the collectible category in order to qualify as a free listing. Basic store for $20 p/m includes 80 free, featured for $50 p/m includes 200, and anchored for $500 p/m is unlimited. Fixed price listing insertion fees once the free allocation is used is 50c with a basic, 20c with a featured, or 5c for media regardless of store level. Auction insertion fees are the same as above, except if in the collectible category, in which case they're $1.

The FVF varies for store items depending on the category - tech gadgets over $200 attract the lowest FVF, at around 5%, media (books, CDs, DVDs, video games etc), fashion (jewellery, clothing, accessories) and some other categories start at 9.5%, while others start at 7%, and it goes down by 1% for each store level (that is, if something is 9.5% with a baisc store, it's 8.5% with a featured, and 7.5% with an anchored). 

If you enter some average (or projected) stats into eBay's fee illustrator, it can give you a basic overview as to which option will provide the best value, based on the financial aspect alone, as it can't take into account variable things like whether auctions will perform better.

http://www.fees.ebay.com.au/feeweb/feeillustrator