that's the biggest issue with importing stuff, the import taxes and the mystery surrounding them. we've looked into it and the price would be unviable in any way that's importing it, because unless you're a big retailer or have an exemption of some kind you're going to get taxed something like 60% of the value of the product or possibly more, in addition to the cost of the product plus shipping which really add up if it's coming from outside the country.
I appreciate your intent with giving us all this information, but importing's just not happening here, unless it's books or sometimes CDs (?) Those aren't taxed, everything else there's a decent chance you'll get screwed over by customs, your estimate is the best possible scenario, except this is brazil so it'd likely be way higher than the R$312 on that listing for the individual buyer like we are.
Looking at amazon again for a simple point of reference, they list that import fees for the Suletta figure (priced at $33.33) is $60.88 which on a bad conversion day can be even more than the totals which would be $94 or R$471. Looking at the site you linked, it would be cut in half (doing very rough maths) but adding the 60% tax would make the price shoot up again. The crappy thing is it's hard to find concrete information on how we're taxed on imports or how much or in what occasion, it's such a mess that not importing anything ends up becoming easier to avoid unforeseen costs and bureaucracy. You need to buy shipping with tracking too otherwise your stuff gets barred at customs and nobody will ever warn you of that, it's happened to me before.
edit: sorry probably should've concluded, this is why the price tag on that listing feels reasonable to me, they've already dealt with the hardest part which is getting the thing in the country. I wish importing things here wasn't so cryptic and expensive for your average person. again thanks for the info regardless, that hobby link website seems super cool.