I wanted to buy a cheap dog carrier so I could occasionally take DMs dog out for walks.
As it was literally only going to be a few times a year that we'd go out in the car to the beach or bigger parks a car ride from her house, I didn't want to spend much and spent a few weeks stalking FB marketplace to see if I could get a second hand one. I sent several enquiries but never actually got a response from anyone.
I was about to give up and just buy a new one from a shop when I found one in like new condition that someone had put outside their house with a 'free, please take' sign on it. I snatched it up and nearly skipped home with my find as the ones I'd been looking at buying were about £50!