Earlier quoted context omitted.
I experienced the opposite a few years back. My wife and I were moving city and needed rid of some perfectly functional appliances and furniture. We listed it all for free because we needed it gone quick and the cost of taking it with us was too high. When by the next day we'd had one enquiry from someone who didn't turn up, we changed tactic and switched everything to £1. Within a day the entire lot was gone, people…
had a similar experience getting rid of furnitures the owner told me i could dispose of: free brings no eyeballs on it, €10 and people were begging if i could do at €8 :)
I wonder if it's a UX thing in these apps that the "free" stuff isn't surfacing but low-priced things are. Perhaps there's just too much free stuff to stand out.