I want to give clarification regarding the price, sure the quotation said is $55 for the full kit, but after some talks with more experienced member it can't be taken as the selling price per se. There's still some 'invisible' expense, starting with shipping and tax at the very basic, then logistics for shipping, and the most hidden one is 'risk cost' which means when things go south (like, shipping replacement keys) there's still money to use NOT from the organizer's pocket to handle. And of course there's profit margin to be considered if we are going to use a 3rd party vendor.
So after do some math, selling price will be $83 for Mondrian full kit (91 keys) if this is done by me which located in Indonesia.
And I just get the halved quotation from GMK which is $36.5 per kit (52 keys). And after do some more math the selling price will be $59 and that means $118 for usable kit (two of it).
At this point I'm leaning towards the full 91 keys kit compared to the halved
But if we ever get a vendor who is located nearer to GMK factory (someone in Germany will be the best one) the story will be all different.
That's it, feel free to give your opinion