Styledrops -- Italian Fashion, With Passion
A sampling of brands: Prada, Gucci, Fendi, Tod's, Hogan, Dior, Fratelli Rossetti, Ferragamo, Cesare Paciotti, Alexander McQueen, John Galliano and Frankie Morello. Check here for the whole list for women, men and kids. Choose by type of item, designer or price.
I haven't purchased from the site so I can't vouch for service or quality, but the site itself is easy to navigate and has some very high-end items.