Whats the most ingenious scam you have heard of

Unfortunately typing about scams probs take a bit of time

Buyer Scam
Man selling a Digger on the Internet £11,500.00
Buyer comes and views the digger happy with the price try's half hearted haggle, they agree on £11.000.00
Buyer has arrived with a big lorry to take the digger away.
So he ask the seller to run him into the local bank where he will withdraw cash
Seller runs the man to the bank, sure enough in he go's come out ten minutes later and pays him £10.000.00 in cash all nice and tidy new notes in bands of £1000.00.
The buyer counts the money and runs him back to the site, they load the lorry and off he toddles.
The kicker they were all fake notes he had them on him all the time he went into the bank and did god knows what and came back out again.
This happened a good few years ago before banking app's and online payments were popular
Rent scam
Farmer rents out an old barn to a guy, the guys pays three months up front, 4 months come and go no more rent Farmer phones the guy disconnected number, give the guy a chance leaves it a month still no rent
So the farmer goes to the barn breaks of the new padlock and the barn was full of tyres stacked to the roof apparently 9'000 odd tyres