You are buying the above lightly used and working Sunon 80mm Black Fan. This fan was purchased a while ago (early in millennium) and appears to be hardly been used.  It has been stored away for a while in a box with similar aged case fans

It also comes with 2 mounting screws.  It has a 2 pin cable which is connected through a 4 pin molex power connectors, there are both the male and female versions of this connector (as shown in the photos).