Buying, selling used items can yield savings, income.
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D003247:Conservation of Natural Resources / Q000191:economics*; D017046:Cost Savings; D004209:Disposable Equipment / Q000191:economics; D004865:Equipment and Supplies, Hospital / Q000191:economics* / Q000600:supply & distribution*; D007182:Income; D008421:Materials Management, Hospital / Q000191:economics* / Q000379:methods; D011682:Purchasing, Hospital / Q000191:economics* / Q000639:trends; D014481:United States