I recall $3K upfront - and it’s no more than $100 a year to maintain. We stored our first of two child’s CB. We figured if the second child, or even a parent needed it, there it is.
I expected we’d hear more of this kind of success by now. But any success is good progress. I hope this type of research continues and more people store CB. It’s really easy.
Cord blood has the advantage that it is less likely to give rise to "graft-vs.-host disease" where the donated blood products / marrow / stem cells try to mount an immune response against the patient receiving the donation.
Disadvantage is you almost always have to freeze and store, in hopes a match will work; and the smaller volume.
("In Soviet Russia, organ rejects YOU!")...
Cheers!