I was just wondering why is the price for upgrading units so high? For every upgradeable unit I have, the price is over 300 gold! That makes the whole feature useless in my opinion, as surely there's absolutely no sense in paying that much money for upgrading a unit! Only expection I've stumbled into was the "early cavalry" (can't remember the exact name, Cursomething) to Cavalry, which costs about 65g. But for everything else it's always over 300, which is insane amount to pay for a unit not to mention just upgrading one.