If Heath sent you the yoyos to help offset his ‘malfunction’, then 100 percent of whatever value can be generated by the the auctions of these Modded yoyos should be for a/to a Cancer based Charity.
That was his original focus and purpose and that should stay on track.
I love the National Yoyo Museum, but that has nothing to do with Cancer Research.
If the person or persons that win any/all of those yoyos wants to donate the yoyo(once they get it) to the Yoyo Museum, then that will/should be their option.
There should be no suggestions of anything but a Cancer Charity.