For in-store pickup only and with stock varying by location, Walmart offers the CRC Heavy Duty Silicone Lubricant 11-oz. Can for $2.28. That's $11 off list and tied with our mention from a week ago as the lowest price we could find. It eliminates sticking, binding, and squeaking on various surfaces, and can also be used as a protectant.
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.