A Japanese guy [YT] spent two weeks in July 2010 travelling across West Japan and sampling food (mostly noodles) from various old-style vending machines…
Only a few of the 70+ items look appetising to be frank. The price of each item is shown on the top banner in the video, ranging around 250-350 yen, which is about 3-4 USD; I think it’s considered cheap by Japanese standard.