Here you will find a databse of antique postacards from all around the world.
M1 Postcards is British postcards
432 Postcards is Australia and the rest of the world (including Crown Dependencies & Overseas Territories)
Once the shop is live, you’ll be able to buy the postcards from the site on mugs, phone covers, t-shirts and other goodies. But it takes time to build a shop! So it’s still under construction.