To be perfectly honest, you will not be able to find authentic designer handbags for wholesale. I'm in wholesale handbags business and we sell 'designer inspired' handbags which means our bags are based on designer style handbags, but do not carry their logo or anything that would confuse customers with the authentic designer handbags.
Reason is simple, big handbags brands, such as Louis Vuitton, Chanel, or Prada have very strict policy on who carries their bags and do not want just any business to carry their merchandise. I promise you any vendors or website advertise saying they're selling designer handbags for wholesale, that should raise a red flag and you should avoid them at all cause. They're just selling counterfeit goods and not only is it illegal to sell counterfeit goods, often times they're running a scam where they get the payment and never send you the bags you ordered or send you defective merchandise.
Once again, you will not find authentic designer handbags for wholesale, and don't believe anyone who says that they do unless you get it directly from the designers themselves.
Hope this post helps.