Win Pearl offers these Stainless Steel Diamond CZ Earrings in Polished or Sadin for $4.99. Coupon code "dealnews40" cuts the price to $2.99. With $3.99 for shipping, that's $12 off list and the lowest price we could find.
Vinegar is arguably the most versatile product in your house. If you aren't using it for all of these purposes, you're probably wasting money.