I think that we will probably never understand why people gripe about obvious stuff like postage prices, but they do, and their attitude can have a bad effect on your DSRs, as well as looking bad in your feedback.

So I have gone to considerable lengths to head them off at the pass, so to speak. If I start having any problems with postage complaints, I will just go over to free postage and increase the prices to cover it. And any items too low-priced for that treatment will go to the car boot sale!