If developed in a shop, I guess it's about .20 cnt / picture if it's 10 x 15 cm. (Ifolor advertises their photos are 0.18cnt.)
Ridiculous would be quite correct. I'd get 15 x 30 cm prints for 1€.
Anyway, since I already have a photo printer, I'll do some A3 (29.7 x 42.0cm, that's 11.69 x 16.53 inches) prints next I guess.