How to auction bottles

Long story short, I was gifted/bequeathed about 2 dozen unopened bottles of various liquors that I have no interest in. They’re all 40+ years old.

I contacted a local alcohol auction and they told me to make a list of the bottles and their ages. I don’t know how old some of these are, or I know a 15 year range at best.

Does anyone know of a place I can take this box and they can tell me what I have? I’m in Chicago if that helps.