Finally, a bizarre product!
Some may recall an old South Park diet parodying Jared Fogle (aka the Subway guy), called "Jared Has Aides", referring to a very poorly named product to help a weight loss diet. Oddly enough, a similarly named 1960s product is also in existence.
"AYDS" seems to have had a resurgence on the internet and eBay because of its close sounding name to a real life disease (AIDS), which generally isn't considered a laughing matter (at least more so in the 1980s and 1990s before better treatments were made available). Obviously, the product in the auction is not for human consumption (it's an empty box, just for kitsch value).