You cannot possibly compare Götze with Podolski though...
Götze was as much a bargain as Bale was overprized. All kinds of things might happen in the future - Götze might fail and turn out to be overrated, Bale might turn out to be completely worth the money. I can't foresee things.
But as I see it right now, in a world where Bale costs 100 million, getting a player like Götze for 37 million is a bargain.
I've known about Isco too. But that doesn't prove whether or not he will be a better #10 for Real than Özil. That remains to be seen. Just as I've known about Mesut before 2010 and even 2009, but how he would be for Real Madrid wasn't visible until he played for them, wasn't it. But if the preseason and a few early Liga games are enough proof for you, there you go. I prefer to wait. I wouldn't say Neymar, who has shown to be brilliant before, has proven himself at Barcelona yet either, or would you?
Has Bale played a complete season for Real then?
Imo Bale hasn't proven himself more than Götze has. Götze is three years younger and has shown to be brilliant in the UCL last season.
Plus, it was only my opinion that Götze > Bale. Buying such a talent for such a price seems like a bargain to me. Don't know what Isco has to do with that.