If that's true, then Martinez should have gone for 50K. You're basing your statement on what knowledge of the player?
Our league sucks, true that. But still some exceptional players came out of that league so... it shouldn't be completelly neglected. 25 goals in 15 games is to be respected, no matter what the league is.
I don't have a strong opinion on Kramaric, haven't seen that much of him...but from what I have seen, he's definitely worth a gamble. He's a good finisher, has good movement and a keen eye for goal. For 10-ish million and a 23 year old striker, I think we can do much worse(as history has proven us). He's definitely worth a gamble IMO.
That said, I doubt we'll land him and I won't lose much sleep over it.