I'd take a chance on him for sure. Ekstraklasa not in the best financial situation.
He scored 14 goals in 9 games so far this season.
Really interesting striker, quick, both footed, nice material for good player in the future. Frankly, if he is not the best player to get from polish ekstraklasa he is one of the best. Anyway, I'm not convinced that he can give our team any approprate boost right now. He is more like melody of the future. It would be great to see Rudniew (in english: Rudnevs) in Serie A, but let him demonstrate his skills for sides like Parma or Chievo before he get transferred to bigger club.
I reckon there is also possibility that he end up like his former team-mate Lewandowski, who is currently playing for Borussia Dortumunt, and has grown up for really nice striker (5 goals, 4 assists in Bundesliga at the momnet). I mean that Germany is really popular destination for guys playing in polish ekstraklasa and I bet there are a lot of clubs currently watching Rudniew closely.
There are a lot of rumours involving Rudniew leaving during winter window, but I think that Lech will sell him next summer for at least 5 - 6m euros.