1)This will help cement our business relation.  2)To establish business relations with you is what we have longed for years.  3)We avail this opportunity to write to you and see if we can establish business relations by a start of some practical transactions.  4)We are too pleased to deal in your products.  5)We are so sorry that we could not answer your letter in due time.  6)Please place order from us if you find our price competitive.  7)We shall get touch with you as soon as we have fresh supplies.  8)We are in bad need of Grade A.  9) With the view to secure orders, please send us a quotation sheet for this article.  10) We very regret our inability to make you an offer at present.