Australian models
If you're an Aussie V8 fan, look away now.
Much of the value in collectable cars in Australia comes from overseas interest as high-end dealerships such as Sydney's Classic Throttle Shop and Melbourne's Dutton Garage regularly buy and sell cars from the UK, Asia and America for customers at home and abroad.
While that 911 R is a desirable car on every corner of the earth, the last Australian HSV GTS-R W1 - a car that costs $169,900 plus on road costs ($200,000-plus on the real world) - has limited appeal outside our shores.
2017 HSV GTSR W1
Shaun Baker, general manager of Dutton Garage, says high prices paid for Australia's last Ford Falcons and Holden Commodores represent "a very big bubble that will burst".
"Australia is a very small market," he says.
"Don't jump on the bandwagon thinking that you're going to make money."
Holden offered buyers of its final Motorsport, Director and Magnum V8-powered models a chance to have their cars delivered in protective plastic. But Baker says they are "rubbish" investments compared to cars with a global appeal.
Classic Throttle Shop spokesman Jay McCormack diplomatically says he is "not quite sure" of the investment potential of late-model Holdens.
But both salesmen are convinced by high-quality European prospects.
"These cars are commodities now. It's sad, but that's the way it is," Baker says.
"The demand will always be there. People are buying them as blue chip investments. They're not driving them - they look at the clock.
"This isn't mum and dad in the suburbs, these are blue chip investors."
McCormack agrees, saying potential investors should consider cars with appeal beyond Australia's shores. McCormack says Japanese models from the 1990s have strong potential for the future - cars such as Subaru's original two-door WRX STI models as well as Australian-delivered Nissan GT-Rs and tech-laden curiosities that may strike a nerve with millennial enthusiasts in years to come.
WRX
"Cool, iconic Japanese cars from the late 1980s and early 1990s are seeing a larger rise - definitely Nissan products and Toyota products which are quite cool," McCormack says.
"That's probably where a bit of the focus is."
Fundamentally, McCormack says people should buy something they enjoy first, because "there is no proven science or formula to buying something that's instantly going to appreciate".