Sold our caravan a couple of years ago - buyers came to house to check it out, offered us a tad lower, we accepted offer, they came back next day with $1000 cash, gave them receipt for that and said until balance was cleared by our bank we would not release the van or have the registration transferred into buyer’s name. All clear a couple of days later, met new owners at vehicle registration place and did the transfer.
We never buy from advertisements, only from well respected companies like Woolworths, Coles, Aldi, Amazon, Myers etc where we can be assured of refund or complaint if something is wrong.
BUYER BEWARE - best to always keep that in mind, and never trust anything you see or read where your money is concerned.