S.J.
I have been selling on ebay since May of 2001. I LOVE IT!
If you want to PM me, I can give you tons of tips and dig into why your items didn't sell. One of the many reasons could be brand (for example wal mart or target brands don't sell nearly as well as baby Gap, Janie and Jack, etc), your low feedback if you've just started or recently had a negative, the condition of the items, the way you listed them (ie not in a lot or as a set).
I have the best luck with my kids' clothing. I can list a lot of my son's jeans, accurately describe them, and almost make what I paid for them, and that is after he got 6 months of wear out of them!
I also sell tons of other items - perfume I bought but only used once, my own clothing I barely wear and it just taking up space, books, DVD's we no longer watch - there are so many possibilities!
Be sure to be honest about the condition of the items, and take TONS of pics - most of the time up to 12 pics can be listed for free, I believe. Also be sure your title is a good one and use words people will search for.
Example: "LOT Baby Toddler Girl Janie and Jack Dresses Size 3T NWT NEW"
That indicates your item is a lot, so more than one, and are new with the tags attached. I added the actual word "new" because people will search that. Sometimes I will also throw in a few other key words, like "skirt" even if most or all are dresses. A mom could very easily get on to search for a "skirt" and end up on my dresses and like them just as well. Leave out words such as "cute" or "fun" - those words aren't searched for nearly as much as "dress" or "____insert brand".
Pm me if you want to chat more! I love this stuff!
ETA: I am not sure ebay allows you to say "like new" any longer, so just be aware that may get you a note from them saying you must revise.