Hi there!

It's $899 and this is the Amazon page for it: https://www.amazon.com/iFi-Diablo-Portable-Headphone-Amplifier/dp/B08S6369VV?ref_=ast_sto_dp

It's not available directly through Amazon yet but should be soon.

Also, with regard to your other question, I'm responding to your DM momentarily!

-Seb