I haven't priced them lately, but I have heard rumors! EIGHT of them, I can't even imagine.
$8,500 low end; $10,000 median; 12,500 high end here in the States.
Down under? Try 100K and that's IF you can even find one...
And stainless steel cages are not optional with these guys. (All of hers were full on 8x8 stainless steel aviary flights.)
Yeah, she had 8 breeder birds, and all of them were as sweet as pie. Tame and playful as could be when they weren't on eggs. She generally only got one baby from each female, and they get hand fed for almost a year, and it's really easy to kill them if you're not careful. Which is one of the many reasons why they're so expensive...
Those guys are true play-ahaulic macaws.
My introduction to Hyacinth Macaws was by standing to close to one who was hanging by his beak and swinging back and forth, while kicking his legs in the air. (I didn't know that was macaw for "pick me up" at the time!) I was just standing there watching him being silly, and then he got enough momentum to swing high enough to grab my shirt.
Suddenly I had this GIGANTIC macaw standing on my chest, towering over me, looking down. Then he put his head upside down, poofed up, and said "Hello. Headscratch?!" [That was an instruction, not a request!]
I played every game that silly bird knew for the next two hours... when I finally tried to leave we had to bribe him off my arm, because he latched on with both feet, and his beak and did the "we shall not be moved" number.
After that, any time I walked in the room, he went off the minute he saw me.
And that's how I became a hyacinth macaw toy!

They really are amazing birds! But I am not uber-wealthy, and in my case, I already have two super bonded big macs that take a significant amount of my time and energy! One more would take away from them...