I have just discovered a fantastic website that sells vintage couture, it's called (not surprisingly)
Vintage Couture. It has loads of designers, and also some anonymous items that are equally as gorgeous! Here are my favourite picks from the collection:

Pierre Cardin
Coat £654 and
Dress £335

Christian Dior
Dress £804 and Nina Ricci
Dress £2,547

Chanel
Suit £4,024 and Chanel
Earrings £150

1950s Evening
Dress £805 and 1950s
Suit £201