special offer:特供，特价

reduced price:减价，削价

reduced to clear:削价处理

close-down sale:（店关闭前的）大甩卖

all stocks must go:大清仓

by-one-get-one-free:买一送一

30% extra free:加送30%（重量）

discount:折扣

10% off:九折

factory outlet:工厂削价产品