Hint: Don't buy anything from the dairy case

From the website of the Longhorn Auction Center in Billings, MT:

In 1952, a Roundup grocery store closed their doors because of a death in the family and was never opened until a few months ago... Over 50 years have passed! Everything was left, including all the memorabilia you would find in a 50s store...This will be the most interesting collectable auction you may ever attend... We will be taking phone and silent bids if you cannot attend, plus when they went into the basement, they found a speakeasy with all the bar signs and memorabilia.