answer:Well, part of the cost would be the launch itself $25k/kg 1 (granted that’s dated) and the time it’s taken to get here (since 2006) 2. Both probably have a lot to do with it. Not to mention the people involved, their time, cost, etc. Another cost, along with the “technology” you mentioned already but might not have considered, is the shielding and component testing necessary to maintain function in a space environment. Radiation tolerance , component stress testing, temperature tolerance, micro impact survivability, etc all have to be tested and retested and sometimes redesigned which of course all costs $$$.