There are many individual sellers on Amazon and Sears.com reselling Harbor Freight tools. Sometimes under the HF brand names, other times (such as this one) omitting them.
In this case a little work with Google shows that the part number they use is an old part number of a Harbor Freight ball joint kit. From the two copies of the tiny, low-resolution picture, they didn't take a picture of an actual product in hand. So this is almost certainly a tiny opportunistic seller. They list a bunch of items they have seen in stores. If they sell from a listing, they use a 25% coupon to buy at the local store, or just have it shipped directly by HF.
This irks me. When I goes to Sears.com, I expect to sells items sold by Sears. Items that exist at the local store, or can shipped there. And presumably something they have glanced at to see if it suitable for the purpose. It's a little less true for Amazon, but I still expect better than FleaBay level buyer-beware.