I have been searching for a stairgate, and looked on a sort of Freecycle site. This ad. came up and I wondered what wall cardboard could possibly be. Here is a picture.🙄 note the heading in orange/red type. Oh my word.
Oh yes, I've found it online (http://www.freelywheely.com/listing/forsale/wall-cardboard) and it says "no room for it as its to big 4 draws 3 cardboard's " It does have 4 drawers and 3 cupboards but it is a base unit, not wall.
I have heard of a site the brings up items that have been spelled wrong on ebay. I think how it works is the items are passed over by searches as in your instance Auntieflo if it was only Cupboards that was being sold and they were itemised as cardboard it could mean there are no bidders. The purchaser using the site then gets the goods at a low price.
I had to comment on someone's FB post the other day. I can't remember what it was about but she had posted 'somethink' not a typo as it was typed the same twice. Esspee