This is probably more relevant to the Down Under folks, but. . . .
As I understand it, quolls (basically, the marsupial convergence with the cat) are a) illegal to privately own, and b) endangered.
If the Australian government said, “OK, you can own them,” would you? I think they could be sold worldwide as “Australian cats,” thus ensuring their survival. However, I don’t know how whether they can be domesticated. That would put a damper on things.
Anyone ever thought about this?
The problem with endanged animals generally is not that government agencies refuse to allow people to keep them as pets but a) they’re completely unsuitable for the general public to look after and b) their natural habitat is being destroyed and that fact isn’t going to be solved by people keeping them as pets.
If quolls could be rescued from extinction by a captive breeding programme the best people to handle it would be trained professionals not any bozo looking for an original Christmas present. IMHO that is.
One other point to consider is that even if quolls could be domesticated safely, your idea of selling them worldwide would depend on you having stock to sell. Endanged animals are, by definition, rare.