If I would buy only offers with two ore more stars rating, then I almost never could buy anything at all.
My discovered neighbours are not offering that much goods and when offering, they try to get most out of their deals. This is acceptable for me.
What I have to critisise is the fact, that the big players with high ranking offer very huge amounts of goods and very expensive too, not being aware, that the trader fee increases the prices to levels that are impossible to buy for lower ranked players.
Even I myself do avoid to buy these offers, (except emergency).