No problem, barrov.

You will be best advised to ask a notaio to help you purchase privately in order to protect yourself from any possible problems with either the purchase or the car itself being not as you would hope it to be, legally.

ACI should be able to effect the transfer, but there is the possibility of all sorts of locally generated problems possible - hence my suggestion to avail yourself of the services of a notaio. Remember that until a couple of years ago ALL car sales had to be made through the notaio, which, after pressure from the motor traders in Italy, is what led led to the relaxation of the law from the point of view of registered auto traders and dealerships.