First of all, this needs a big warehouse-like building. I thought this was a good business for people who are broke because you can always shop a little more, perhaps on credit by the store.
Every professional shopper receives an area to put the clothes they purchase for the store. So, they basically shop for themselves, or someone like themselves. Each clothes area would have a sign, like female, 5'6", 130lbs, favorite brands: Hot Topic, Forever 21, Roxy, etc., etc.
The benefit of this arrangement is that you, the consumer, can find a little area that has clothes that all fit you and are all your style, and shopping for yourself as a professional shopper is work but perhaps fun work. Of course, clothes would be sold marked up but perhaps not to too expensive because professional shoppers always search for bargains! Professional shoppers receive part of the markup. I think maybe everything would be $30 or something.
I thought this was a good business model to help the unemployed because as an unemployed person you could save your broke ass by shopping on credit. However, I do not think one could make very much money by this business model, but it IS a time killer. Maybe people would just be on salary or make $5 every time they find something.
I do not know how to rate my business ideas, but it seems like you just go for it and see if it pans out. It's unknown what the public would do.