Be careful when looking for a sales rep. I would start off looking for a road rep, so that you don't have to pay monthly rent fees or high market fees.
Make sure you scrutinize over the contract with them, as I got screwed over big time with my old reps. Ask for a list of brands they rep, and even contact those companies to get a review.
Reps will say anything to get you to sign up, so just make sure they are doing well and are honest (relatively). I don't know what area you are in, but try to do some fashion networking, and ask people aroudn in the industry if they have any referrals.