a great sale 通常指搞促销活动的特卖场。a great price 常指性价比高的产品，对买卖双方来讲，都是物有所值的产品，也常指价格合理、便宜。

请体会语料库例句：

1. I bought them at a great sale at the mall yesterday.

2. Some years ago, at a great sale of wine, all the odd lots were purchased by a grocer in a small way in the old town of Edinburgh.

3. Janette told him that she bought them at a great sale price, but she wouldn't tell him how much she paid for them.

4. This would allow me to collect the premium up front, and potentially allow me to buy the stock at a great price.

5. It is a really good wine at a great price.