There's no logic to the way the items wall works. I didn't get on it to start with but if I had my time again I'd just start a new account and try again. Some new accounts on here are cursed, some are up in the wall instantly and there is no way you can tell which you will be until you start. It's basically like flipping a coin.
As PF has said already, if you're active in the community and do a good job for a fair price you'll get customers in time. Just stay on point because good reputations for new vendors are hard to earn and easy to lose.