Royal Ephemera

[julie smith]

Hello, 

I have a large collection of royal ephemera including invitations to prince Charles and princess Diana. My father worked at the royal families printers in London for many years and was given the selection over 30 years ago. The collection includes invitations to the wedding, breakfast, supper, dance etc. I would now like to sell them.
 The invitations are all blank and in mint condition. There are also other items including Christmas cards and items relating to HMS Britannia.

I would now like to sell them and would be very grateful for any tips or advice on where to start.
 Thank you.