As far as cost goes, you need to keep two things in mind.
What Dr. Wall just said is absolutely true. The cost of cord blood units from international banks varies between US$20,000, which is especially low, and US$30,000 or US$35,000. Units that come from Héma-Québec cost the same thing. I would put the current cost of a cord blood unit at around US$35,000.
You also need to consider the cost associated with putting a cord blood unit in a bank. As mentioned earlier, not every unit in the bank will eventually be used. A mature bank is said to use around 2% of its cord blood units. The current cost of adding to a very mature bank's inventory varies between US$2,500 and US$3,000 a unit and can even be as high as US$4,000.
Those are two completely different units of measurement. You have the cost of banking a unit and the cost of distributing it.