1."可以给你便宜一点"。“I can give you a little cheaper.”

2."这个已经是最低价了，不能再给你便宜了."我想这句话可以说的委婉点“Sorry, this is already the lowest price, please forgive me， I can not give you cheap”

3.“你想多少钱要？”“How much do you want?”

4."想要的话你再加一下.""Add a little and you can take it."

还有，比如：

1.“这件商品质量好，这个价格不会贵！”“This product is good quality, the price will not be expensive！”

2.“这件商品的价格是很合理的！”“This product is a very reasonable price!”

3.“我是不会骗你的，这件商品真的是又好又便宜。”“I will not deceive you, this is really good and cheap goods。”

4.“你先别走，我们在商量商量.”“You do not go first, we talk a while.”