That item was on closeout and is now out of stock, and hasn't been removed yet. Other items might temporarily out of stock. Search on Sears.com and select Sears Only for items sold by Sears. You'll only see current items there.
You might be looking at discontinued items. Sort search results by Latest Arrivals. You can also visit Sears.com or Kmart.com and search for items, where only see current items. Select Sears Only for items sold by Sears.