买东西便宜英语怎么说

"买东西便宜"可以用英文表示为"to get a good deal on something" 或者 "to get something at a discounted price."
"To get a good deal on something"的意思是在购买某样东西时获得优惠或特价，例如：
I got a good deal on this TV because it was on sale. (我在购买这台电视时得到了优惠，因为它正在打折。)
I'm always looking for ways to get a good deal on groceries. (我一直在寻找买杂货时获得优惠的方法。)
"To get something at a discounted price"的意思是在购买某样东西时获得折扣价，例如：
I was able to get the dress at a discounted price because it was on clearance. (我能够以折扣价买到这件连衣裙，因为它正在清仓出售。)
By using a coupon, I was able to get the shoes at a discounted price. (使用优惠券后，我能够以折扣价购买鞋子。)