The phrase "excellent buy" means that something is a really good purchase or deal. It implies that the item you are buying is of high quality and worth the money you are spending on it. Full definition
This handset is using latest hardware, performance is smooth, lag free and excellent buy for the price, especially for those looking for a smaller 5 inch screen. (gogi.in)
They provided us with a great value and excellent buying experience. (lawautogroup.com)
However, macro trends can be useful in that they often create excellent buying opportunities. (valuestockguide.com)