Halle it is unpredictable. Sometimes you need to pay more for extra photos and half an hour later (or so it seems) they are all free. I have yet to fathom what I am doing differently 
I seem to find Mondays a good day for selling on ebay. I have had heaps of action on my listings today: watchers, bids and questions.
I have a pile of books ending tonight with no movement on them at all. I have a game I relisted (originally at 99p now at 1.99) that has now sold - bidding isn't finished but it looks like it will be 1.99. How strange when it didn't sell at 99p.
Halle I mostly sell children's clothes and have found Mini Boden, Nike, Hello Kitty branded items, Joules and stuff like that sells well - often close to purchase price and in one case twice purchase price
The vast majority of our stuff is Next though and although it nearly always sells, the prices are more modest. That said, it is still more money than if I just donated them and goodness knows I need the cash. 
I have dabbled in selling childrens card games and jigsaws and, again, they sell but not for large sums. The postage on these items means that bids will always be limited.