If you can find a mini stud doing an interstate run then about $250 is the average, if you have to use a commerical transport your looking at around $500. They change a bit depending on how out of the way you are, but you knock that down again by picking up from a drop off point.
Next year I should have Kalari in foal to an outside stud as long as she takes this time!
Pallidon is running with Twinkles and Rivain, Tinker with Belle and Ashanti.