想問一些有關銷售優惠既英文？謝謝！

1.產品優惠活動：
推廣期間，凡購買任何 BOX SET ，所有配件產品均可享有半價優惠
Promotional Event:
All accessories (配件) are 50% off with purchase (購買) of any box set during promotional period (推廣期).

2.（X）三週年紀念，推出（X產品）特別版：
為慶祝（ X） 成立三週年，我們推出 （X 紀念版）全球限量300個
Special Edition (特別版) for ABC's 3rd anniversary:
300 ABC Limited Edition (限量版) (item name, eg watches/cars/mugs/cell phones...) will be launched (推出) worldwide (全球) to celebrate (慶祝) its 3rd anniversary.

3.數量有限，售完即止
While supplies last

4,買5送1：
凡購買任何5款衣服，可免費獲贈多任何一款
Buy 5 get 1 Free:
Get an extra one on us/for free when you buy 5

5.產品限量優惠，售完即止 （請留意網頁顯示）
It is a limited quantity sale (限量優惠) (Please refer (參考) to our website)

6.贈品送完即止
Complimentary (免費)/Free gift while stocks last

7.（8折優惠）截止日期為：
The 20% off offer (優惠) is valid (有效) until (直至):

8.定價 ／ 優惠價
Original Price / Promotional Price

1) Products extention show:
During the period of extension, with any purchase of Box set, its accessories will be at 50% discount or half price;
2) (X) anniversary sale with publishing special edition set:
To celebrate the 3rd anniversary of (X) , we have only published (X memorial edition set) worldwide with limited quantity of 300;
3) The quantities is limited while stock last;
4) Buy 5 get 1 free:
Buy any 5 styles of clothing get one style free;
5) Product's discount while quantities last (please check our website for details);
6) Free gifts given while quantities last;
7) (20% Discount) expired as on -----------;
8) marked price/ discount price;

送/售完即止 in English:

... while stocks last.