Those are discontinued items that you are looking at. Go to Sears.com for current items. Search for something, then select the Sears Only tab for items sold by Sears, which you can use points towards.
Here are some examples:
Boy's socks:
sears.com/search=boy's%20socks?levels=Clothing&searsTab=true
Boy's clothing:
sears.com/search=all%20boy's%20clothing?levels=Clothing_Boys%27%20Clothing&searsTab=true
Boy's shoes:
sears.com/search=boy's%20shoes?searsTab=true