She wrote she had fifty cards free of charge visiting the website moo.com. She seemed very satisfied, so I tried it out. And incredibly, it actually worked. And fast. I must say the platform is very user friendly, good for internet-challenged people as I am. The result looked very pretty on screen.
I've purchased the cards and paid just the postal rate. Fair enough, about three pounds VAT included.
Positive note: I was delighted I was eventually able to use my paypal account, which I thought of as completely useless. At least the websites where I happen to buy do not accept it.
Curiosity: It's an old-style viral promotion. After purchasing, they give you a link and offer you a discount if a friend of yours come to them "brought by you". As in gyms and social networks (though explicitly said).
Etsians: the Moo.com initiative works great for those who have an etsy shop, since you can upload images directly from your etsy page (as with craftcult). But the promotion is open to anybody.
Suggestion: You can use it also with more creativity than I did. I chose pictures from my shop - easy going -, but I could have printed mignon tarots! Illustrators are warned :)
Have a nice day!