You have been lucky I sold a chainsaw privately once, ten days later he came back said it was stupid to start .So if you don't want comeback use a auction.I've sold two bikes on here, one on FB marketplace and one on Nextdoor.
Three of those I took cash as I didn't know the buyer, one I knew the buyer from on here and he did a bank transfer, which I could verify with my bank immediately. All went smoothly.
Unless it's something really niche I'd always start off here, then FB and Nextdoor.
Why pay to sell if you don't have to?