Is this letter correct?

We thank you for enquiry of 3rd June and we are pleased to know that you like our range of watches.

As our items are very famous all over the country for (its) top quality, we are sure your clients will appreciate them.

Our usual terms of payment are by advanced bank transfer, but we can discuss a draft at 30 days for any order of over 250 items. We would grant a trade discount of 30 %.for any orders beyond 300 items.

We would also like to inform you that we despatch our goods by FAS which will be charged invoice and that you could be sure that delivery will be performed within ten days from the receipt of order.
(*charged invoice is unclear in meaning? Does it mean additional charges will be incur for delivery by FAS?)

Here enclosed you will find our latest catalogue and price-list; a sample will reach you under separate cover.

We hope that you have got all the information you need and look forward to receiving your order. We would also like to inform you that more details about this article are available on our web site.

Ok.. well written mate!

Seems to be fine.