Buying a car space from a neighbour.

Anyone done (or considered) this?

Specifically, negotiating and executing the purchase and re-titling of an allocated car space in a strata complex.

Simply curious.
If the car space is already a seperate title from the unit, sale is just like any other purchase. Transfer title in consideration for $.
it can be a major job if the carpark is part of the unit title as it requires a resubdivision of units. It will depend on which state's legislation you are working under, but can require unanimous consent of all owners (and registered interests), then cancellation of the units plan and issue of new one with revised unit entitlements.

However if the carpark is on a separate title or an exclusive use arrangement then its easier.