The phrase "good buy" refers to something that is a great value or a wise purchase. There are several synonyms that can be used to convey the same message, including bargain, steal, deal, value, and purchase. A bargain is a purchase made at an unusually low price. A steal is a purchase that is obtained at an extremely low cost, often by taking advantage of a sale or promotion. A deal is a purchase that is made with special incentives or discounts. A value is something that is worth more than what is being paid for it. Finally, a purchase simply refers to any item that is bought or acquired.