vegimite said "comes in that the transaction can be cancelled the same day and funds retracted.
I would just insist on cash, take a picture of the buyer/seller and as others have said meet somewhere safe. Did not the Police service have a meeting space or maybe just meet in their car park. "
The police have a safe meet place just south of their parking lot near the monument. I would also recommend insisting on a cash only deal. Cash can't be cancelled or held back by the buyer after the transaction.
Safe selling!