The Hang drum is a gorgeous instrument. When I found out about them a year or two back I thought about getting one. Then I found out that they're made by one company (in Switzerland, I think) and that they're not currently in production while they're doing development on their next instrument. The hang drums you see on eBay go for eye watering amounts :(
This is my favourite Hang drum piece. I could listen to it forever :D

https://youtu.be/xk3BvNLeNgw