B2B market place

Its a B2B E-commerce site in Magento,it include 1)(Bulk uploading through excel sheet with dropdown facility so that seller need not have to write every time he can select from the options given in drop down 2)minimum order quantity (MOQ)option,certain limit will be set by the seller for eg minimum 80 boxes of necklaces need to be purchase by the Buyer not less than that but a buyer can purchase above that range i:e 81boxes or 90 boxes...... 3) ETC ETC Those who are expertise in magento,please reply