There is no reason to be suspicious of The Couture Exchange. I have purchased from them at both locations (Westfield and Shrewsbury), and they are totally legitimate. I have purchased handbags, wallets, and shoes, and the items were all in wonderful condition. I was just there last week, and the merchandise is authentic and beautifully displayed.
I have also consigned items with them, and they are absolutely wonderful to deal with. I recommend them highly, so please shop without reservations.
I have no connections with The Couture Exchange, other than being a happy customer! Once you stop by, I'm sure you'll feel exactly the same.