IDK, I paid about $175 for it shipped from HDFury. Maybe because its full 4k/60 4:4:4 and HDR support?
It takes one 1 hdmi input up to 4k/60 4:4:4 and sends it out as up to 4k/60 4:4:4 on hdmi #1 without audio and on #hdmi #2 it sends a black screen 720p or 1080p (your choice) with the audio...