Here's another favorite of mine:
"Rare" Filter Queen/ Hoover/ Lux etc. attachment - usually a de-mother or a sprayer, the seller states they have no idea what it does and sticks a 50-100 dollar price on it. I laugh when I see those on Buy-It-Now eBay listings.
Or my other favorite.....Spray Paint- an eBay seller will mercilessly attack a vintage cleaner with rattle can paint- nothing is spared!- hose, attachments everything; all dripping with a runny, botched application of "rattle can blue" or Fire Engine Red or what ever color of spray paint was on sale that week. Then, they have the audacity to call it "RARE" , "ORIGINAL" ... or whatever term they use , stick a high price on it and think someone will actually buy it.
Personally, I kind of laugh and take it as a mild insult to my intelligence.
I just chuckle and keep scrolling.
lol