i think $800 is too high, $600 are negotiable, $500 are acceptable price.
anyway
how much it cost while shipping to indonesia with ems, postal code 55163?
I am afraid, EMS is not available between your zip from mine.
ems are available to indonesia, yogyakarta.
i buy device from china using aliexpess is available.
or if ems not available, please calculate using ups or dhl or other shipping methods
I'll get you the quote by today.