The seller sold the equipment to one of its partners and claimed for damages, which was the difference between the price they finally got and the price agreed upon with the defendant.
卖方遂将设备出售给其一名合伙人并向买方要求损害赔偿，损害赔偿的数额为卖方最后得到的价款与同被告议定的价款之间的差额。