Interestingly Spain didn't use to be a place with much selection and had a bit of mark up on film prices. Back in 2010 or so I remember getting some film from UK. UK and Germany seemed to be the countries for film in EU, then US and Japan on the other sides.
But a lab opened around '13, in the style of FINDlab, Indie, RPL et al. These labs that work online and follow a different approach. Then they carried film with very small mark up and prices comparable or even better than the main retailers (maco, etc).
They seem to be quite succesful, attracting customers from abroad and being popular with Russians!
Curious it is located in neither of the main cities, Madrid and Barcelona. If they were in the latter I'd drop around more frequently.