Honestly at the low level of them and the time it uses to pick it up you lose A LOT OF GPH! My tought is that its not ok to pick up anything except legendaries (wich are crap to at that level).
It would be a good ideea to pick blues and sell them if for example is ur first char and you dont have gold to buy items with Gold find, so no goldfind meaning few gold per run, picking items and selling them would make more...