one very practical benefit (pero wag sanang abusuhin) is that d government has no jurisdiction over the diplomatic official. ergo, d yan pwedeng hulihin for traffic and other road regulations; in fact, diplomatic immunity, as sanctioned by international law, even extends to criminal and civil cases within the proper parameters. i dnt think such plates wud be for sale because it is only meant to be used by ambassadors and other diplomatic officials and one has to present himself first to the government before he is recognized as one. thus, it is only after that process, wud he be able to get those plates =)