Fantasyireland is the "new thread" police. Lol!
But to answer your question. Porto is probably not looking at selling him. But if he wants to move to a bigger club, and they offer enough money, they'll probably let him go.
As per style, he is a bit like Tevez, but has a better shot, is a better dribbler, and he is faster. Not to mention he is left footed, but can use his right well enough. He is very selfish (like Tevez). Goes it alone often, but when in the mood, has a pretty pass touch. Could be a hit or miss. He wasn't very productive early on at Porto but grew into the role and this season, he has been spectacular.
Started out on the right in a 3 man strike force with Varela and Falcao. But Falcao got injured so he moved to the middle and some young Argentine kid now plays on the left with Varela moving right. Or some permutation of that. Has scored more goals this season, but has cooled off of late and Porto is head and shoulders better than the rest of the league. So it is a bit hard to judge how good he will be when he is not the best player on the best team in the league.
But his forceful style, and never give up attitude is why he is often mentioned as a replacement for Tevez.
Hope that helped :)