my nt scan was $80 and i got $40 or something back from medicare.. mine was done at the local hospital.
my blood test was free (at the local pathology) but i got the bill for the lab work after (for the combined screening).. and that was $100 odd and i got some money back from medicare for that too.

EDIT: whoops i noticed you dont have medicare... can i ask why? its seriously saved my life!!