Hi, apologies for the late reply as your message got caught in the spam folder.
As the sound brick is unique to this set, it's considered a rare item. Last year prices for the sound brick were changing hands around the $200 mark but recent ones for sale are going for around $300.
Not sure if there will be any takers at $300 but it's still quite a lot of money even at $200.
Good luck with the sale.
What is a reasonable price to pay for the sound brick from the carousel?
I am selling a slightly incomplete kit and someone has asked to buy just the sound brick.
Thanks for your advice.