I visit Japan quite regularly, so I just plan the purchase around my travel plans.
The CIEM is 300,000yen ex tax. overall it's actually around the same price as the Shure KSE1500 and cheaper than say an AK380, but this is a no-compromise customized experience that's priceless and I'd even consider it a bargain to be honest because you aren't messing around with tweaking or mods or looking for "synergy" in equipment pairing or that final 1% tweaking in different cables and interconnects - it's THE deal;
it puts a complete stop in the quest to look for better sound, so in the long run it probably even saved you money (until your taste in sound changes completely). As one Japanese blogger put it bluntly in his review - if you purchased the MH1 and found that the sound isn't right for you, you're an idiot.