Is it one of the kits that was put together up here, or one of the factory cars? Big difference. Asking price for the last one I saw on the samba was US$10K in mediocre shape. Lots of useful info at:
http://wj2d.100megsdns.com/home.html Last time I was in Brazil most parts were still available, and there are several exporters who speak English.
It's a nice car, though tends to rattle a bit after a few years. It also has the unfortunate reputation of being a "kit car" up here, but down there was a regular limited production car. One of the concessions VW made with the Brazilian government to be permitted to set up manufacturing was that they'd supply components to Brazilian companies. Idea was to help and not kill off the fledgling local manufacturing economy, which resulted in all kinds of companies like Puma and Chamonix (the Beck 550 Spyder), making really interesting cars.