In order to lower the risk, most dealers have recently adopted a policy of "only selling, not buying." If they run short of goods, they'd rather borrow some from others in the same line than to buy them on the open market.
大部分郵商為降低風險，近來都採取「只賣不買」政策，缺貨時寧可向同行調借，也不願意向坊間收購。