I'm finding it hit or miss.
Not trying to sell a car, but sold the 11 year old appliances out of my remodeled home. I'd get the "Is the still available?" message from a handful of people. Apparently, if you click to message someone about something, that is the default message sent.
The appliances sold, but then when we bought a new dryer with the money from the appliances, the old dryer has been in my hands for about 3 weeks.
The original set buyer flaked as he was going to give me $100 for the dryer.
I get people from 100 miles away asking about a $40 old laptop I wiped the drive and installed Linux on it, only to then get a message that her husband said she can't buy it.
But in other news, hours after I listed my 5 station cordless phone set, saying we cut the cord, but you can have these today for $20 so you don't miss any upcoming election or telemarketing calls, they sold.
Ditto for old bike wheels. Sold for my $150 asking price in a day.
I think the cake was I put an old artificial pre-lit Christmas tree on my front porch, gave the name of the subdivision and said as long as the ad is up, you can come get it for free. I clearly said I was not delivering a free tree, they had to come get it. So I'd get "will you deliver" or "where are you" (we are the only house in the subdivision with a lit up tree on the front porch at the end of January.)
Remember, half of all people are below average intelligence