I read that some sellers on eBay are selling expired products. For example take sunscreen it has a shelf life of one year before it expires. I recommend that you only buy these products from a seller that has feedback from someone that has bought this product and has left good feedback. Also check the auction description carefully to see if they list the expiration date. You also may want to email the seller to make sure you are getting a product that isn’t expired.
Here are some products that have an expiration date:
Over the Counter Drugs
Gift Cards & Certificates