You can choose the value of the package when you create it on zenmarket. I usually set to around 700jpy. Looks like you're getting absolutely fucked by fees, duty and taxes tbh.
It was a Visvim Lhamo. As I have never proxied anything before, I just wanted to cover myself if it all turned out to be bollocks and went tits up. I also asked them to keep all the labels and packaging, should I need to move it on, as it is a size smaller than I would normally get. Considering they can retail for about £800 in the UK, I was happy to take the risk. I used FedEx as well, which may have made a difference.