Typically, it would be GSA who would be handling property situations for government organizations. In this case, I’d go look at the guy who approved the sale and if he possibly had any overseas accounts. In this case, with the suggested sales price...he could have asked ten-million to let the price go like it did. You would think there would be competition and the sales would have easily gone to the max limit. It must have been a closed-bid situation, which ought to invoke an IG investigation.
In the USA. Overseas, for State Department it is the Overseas Building Operations, OBO.
https://overseasbuildings.state.gov/about