I guess it really depends on why you are doing the runs, for specific items you need on your char such as LK boots,belt, i would't farm the PL, but for generating most "wealth" it might be the best way, but you have to consider the time it takes you to trade items to get that wealth. there is no "downtime" if you find the items you need, but if you have to rely on someone else to wanted what you find to get a currency out of it such as gold/hr's w/e, thats time you need to spend not calculated into the clear speeds it self.