Yeah, they are. I was told 160% more or less by a dealer in Fortaleza. You can have whomever sends you the parts declare a lower-than-true price, but customs has a great big book listing everything and it's value, so it can't be ridiculously low. Locally made parts, if they're suitable, are heart-warmingly cheap but also shoddy. Sorry, mate.
James (also in BA)