These are charity based thrift stores in an affluent neighborhood. A large portion of the customers are also donors. We lobby hard for fair prices. I also receive senior citizen discounts.Often they make mistakes. For instance the integrated amp was presumed dead when all it needed was jumper cables and to be "run-in" for a few days. An Fm dipole cable vastly improves fm tuner performance. I carry such items in my pocket when shopping.
The staff generally ignores my advice. The customers listen.