I do know that certain charity shop managers take the better stuff that is given to the charity and then flog it on eBay for their own gain.
That was one of the reasons the gf quit her work with the charity she volunteered for. She did not volunteer for fun or for the love of the charity - however when she was there she gave it 100% effort. She volunteered because she needed something positive on her CV and "sitting at home doing f*ck all all day" is no good on a CV.