Often places want to see some kind of history or track record of your sales. They don't want to waste time with people that haven't sold anything yet.
However, if you're new to this. It might not be a good idea to go into such a competitive market place less you have the capital. I think the biggest mistake most new people do is go after a high end, or competitive market place.
Here are the reasons,
1) You don't have enough money to lower the prices for a lot of wholesalers. While other bigger stores do, so you can't win on price.
2) Too many people are doing the same thing... you become one of many instead of one of a few.
Hope this helps.