Air-cooled coolers vary in price, and the main difference in their price is the base, not the fan. For example, copper base thermal conductivity is much better than aluminum, the price is also much more expensive
You this case, go to the computer city to ask, if there is a single buy personal estimate is about 10-20 like. If there is no sale, you directly buy a 250 with a complete set of fans is it, pick the cheaper. Go home and take the fan off and use it, and keep the base in case you don't need it. A cheaper fan is only 2 or 30 bucks
I hope my answer is helpful to you!