商品存货 meaning in English

merchandise inventory
trading stock

Recently had the individual buyer after to win the auction to request the change commodity color ? only to be suitable the similar commodity to have the many kinds of colors ? , how buyer this kind of request frequently to cause our commodity goods in stock insufficiency
近日有个别买家在胜出拍卖后要求更改商品颜色?只适用同类商品有多种颜色? ，奈何买家这种要求经常导致我们的商品存货不足。