As far as the categories go, there are things that go under Collectables that you wouldn't expect to, and as a result they can have auctions as part of the 200 free listings. Here's a link that you'll find on the compare fees page.
http://sellercentre.ebay.com.au/sites/default/files/fees_by_category.pdf
If you look down towards the bottom on the left it shows all the categories that are included under Collectables for the purposes of fees and for using your 200 free listings as auctions. It includes antiques, art, coins, collectables, craft, dolls & bears, pottery & glass, and stamps. You can have auctions for any of these categories without being charged a listing fee, but you will be charged an extra 1.5% for your FVF (only for stores). I've sold the odd craft item as an auction and was charged the higher fvf but no listing fee. It seems strange that crafts comes under collectables, though I do have a few 'crafty' friends who might dispute that. 
