I spent a lot of time desperately trying to scavenge raw materials. you should put the recycling feature in the tutorial early on - took me until level 5 to figure it out on my own.
apart from that, brilliant game, loving it!
okay, i made the mistake and went to beat the underworld AGAIN to get some quality items.. turns out, despite the treasure value of >250, I get back, spammed with coal again. so much for "random item"!