I've suddenly gained an interest in collecting adult playing cards. I've never collected cards before, so this is new to me.

Through extensive googling, I've found out about various sets of cards made by different porn companies at different points on time. These, however, do not seem to be available on eBay or Amazon. Beyond that, it seems some of them can be bought on either online card collector stores or online sex shops.

Does anyone have any advice for where I should be looking for this kind of thing? How do I know which sites are safe to buy from? And are there any that would be based in Europe (where I live) since it seems to cost a fortune to have cards shipped from the US.