That page has a few anecdotes. In summmary:
Case one: $35 (product cost) + $40 (international UPS shipping) + $100 (import and administration taxes)
Case two: "I bought one R-Pi from Farnell Brazil (http://www.farnell.com.br/) and I paid R$185,50 ( ~ U$90) with taxes and postage."
I remember trying to help some Brazilian users find the cheapest way to get a hold of one a couple of years ago, and I heard similar stories: high import taxes even when there were official distributors operating in the country, and high shipping charges when there weren't and they needed to order the devices internationally. I don't think that it's resellers trying to fleece their customers. I think it's just a fact of the Brazilian government's policies.
Now the cost is higher due to low volume imports, so you end up paying more for shipping the boards. Also, taxes are higher if an individual is importing stuff, as customs use a simplified 60% tax over the retail price vs using the specific import tax (around 45% for the Pi) over the reseller price.