To the person who's selling the mayo, I might suggest they try calling 1-800-get-a-life. While cleaning the yard over the summer, I found an old loaf of stale bread we threw out hiding behind the garbage cans. It was rock hard but all in tact. I can't believe I threw it out when I couldve sold it on e-pay !!
That's not as bad as me cleaning out my kid's closet and finding an old Peanut butter and jelly sandwich stashed in the corner. The thing was about 3 years old.