$650 actually, $150 is freight. Made in Japan by Shoichi Yoshimoto and sold direct.
The GoldNote PH-10 and PSU-10 it replaced list for $3300.
Dealer cost is $1980, distributor cost is around $1,500. Probably costs $500 to make them, maybe less. You get the picture.
I bought the model 4 after a members here said he preferred it to a $9k Allnic. He just bought a second one.
As for cables, I use Zavfino Fusion and I lucked out on a used pair for $200 (rare find) but even new they are on sale I think for $357. (I also used balanced with the GoldNote )
The Model 4 sits between some fairly expensive gear and Many here would suggest I should spend 10x what I spent on the PS. Details in my virtual system.