Current issue "military armor" is barely better than nothing. Our enemies are well aware that it will not stop bullets, and it is a abhorrent injustice that our boys were not allowed to use armor they purchased which more often than not was "dragon skin" which will stop repeated hits from close range high power rifles. I wouldn't buy military flak at all. Only good reliably for shrapnel.
Dragon skin is worth thousands, depending on coverage. Otherwise, theres spectra and Kevlar, based on threat level. I, too, would be very leery of a seller selling "military armor".