Of course!
That's not a bad collection your man has got there! Though pontificating and rambling, I think I'd want to swop the 4-litre Bentley [no real Bentley steam train torque] and the Vauxhall 30/98 [no front brakes even if it's a later car with drums and linings at the front] for a 3-litre twin cam Sunbeam which was one of the great unsung Vintage cars. Or maybe a Voisin 'cos they're just so funky! [Yup, that's the right word for a 1920s Art Deco car!].
Then I've always wanted to own a Bugatti [I nearly bought a horrid home-bodied Brescia in the mid 90s] but I'd settle for a type 37 [4cyl] plus cash to run it rather than a type 35 [8cyl] 'cos surely there's only half as much to go wrong? There are certainly only half the plugs to change every time you want to take the car to the shops!
As for the 540K, I grew up with a 38/250 SSK in the family and a 380K and I couldn't possibly make use of any Grosser Merc because I haven't got an HGV1 licence!