Take a look at this 15C:
http://produto.mercadolivre.com.br/MLB-34288870-calculadora-hp-15c-novinha-_JM
It is selling for R$ 300.00 (about $133), fixed price. Not bad comparing to eBay prices, but somewhat expensive here (Exactly one-month wages of a non-qualified worker). They usually sell for R$ 220.00 here (about $97), when they show up. Apparently the seller doesn't tell his 15C from a 12C Platinum, as he lists the specifications of the latter. Also he says this is his final price because he saw a brand new one selling for R$ 500.00 (~ $221) in a store. Yes, here the 12C Platinum costs this much, at least off Black Market.
I know European prices are generally higher than American prices, though not so high as they are here. Just out of curiosity, what is the official price of HP calculators around the world, say the 12C Platinum? I mean prices on local stores, as prices on the internet stores usually are lower. Thanks!