I have visited a store before but i was just to donate items.I never shopped there.I don't think there is anything wrong with buying items there but for me it's just weird.I know they have to sell things to make money but i really wish they would donate more then sell it.
If you don't mind reusing clothes, it can sometimes be a good place too. One of the Salvation Army's near me has a color tag sale each week. Whatever that color is, clothes is .25 for kids clothes and .50 for adults. Not too shabby.