I know this is not very Spanish, but my wife found great European Birkenstock models in Italy for about half the price they charge in the US. But we've never seen any on sale in Spain. Does anyone know of a store in Spain that sells Birkenstocks?

Real Birkenstocks, I haven't seen. A few years ago (or several) you could find look a likes, after the U.S. was selling tons, but they usually were worn in summer either at the beach or just hanging out. I remember in '90 I had a pair Birkenstocks I had purchased in Germany five years earlier and my roommates (in Spain) nearly died. They thought they were the most hideous things they had ever laid eyes on. Years later she had the look a likes (Panama Jack, I think) and I gave her a hard time.

I'm sure you'd be able to find Birkenstocks or at least a knock-off equivalent with a different spelling like "Bhirkenstock" or "Birkenstick" at the Rastro or other public "flea market". I noticed that you could always find rip-off Reeboks named "Raerbok" or "Rerwyuk" (huh?) in the "market"...