Cryogenic treatment of metals makes them stronger and gives them better thermal and electrical properties. To get quotes on this kind of treatment, type "cryogenic treatment" into Google and contact the vendors.
I suspect, however, that you are asking how much it costs for human cryopreservation (cryonics). Cryogenics is low temperature physics: "The branches of physics and engineering that involve the study of very low temperatures, how to produce them, and how materials behave at those temperatures". By contrast, cryonics is "The emerging medical technology of cryopreserving humans and animals with the intention of future revival."
Cryonics attempts to use cryogenic temperatures to preserve brain structure without damage. Rather than freezing, body water is replaced by anti-freeze compounds. Body tissues are best preserved if a team of people can be standing by the bedside of a terminal person and begin cooling and restoration of circulation immediately following legal pronouncement of death. After initial cooling to near-zero temperature, cryonics organizations replace body water with anti-freeze (vitrification) compounds to prevent ice damage.
Costs of cryonic preservation vary according to the cryonics organization used and the kind of service obtained. Costs range from $28,000 to $150,000 (see the bottom link below).