The beauty of players coming from "lesser" leagues is that they generally don't cost very much. If he's cheap, then I say he's worth a punt if he'll actually get some first-team minutes. If not, then fuck it and don't even bother. Btw, we do have Xisco who had in the top 3 (although there's some debate?) best goals/minute ratios in his league which was far superior to the Austrian league and he doesn't even get minutes on the pitch. Everything's relative.