We bought 2 vintage Bentleys a 3 litre Brooklands record holder and 41/2 little blown in about 1975 for £20.000 about the price of a 4 bedroom detached house, about a year later sold the 3 litre for about £10,000 to a Swedish collector and got a £1.5 million offer for the blown Bentley in 1997 when interest rates on deposits were 10% - offer not accepted.
Now we have some Broughs going for about £200,000, good luck. I wouldn’t be a buyer.