I disagree. In my understanding of the process, the only cost to the CMP or our government is the cost of shipping the firearms back to this country.
Now granted,, shipping costs today are much higher than when these firearms were transferred to foreign countries in the first place, however, as with those moved over to Bavarian countries, they were already there when the war ended. The same goes for those guns we see coming back from Greece and Italy.
I doubt the shipping costs are as much as is reflected by CMP prices for their firearms. They're a not-for-profit congressional organization, using whatever profits they gain from selling surplus rifles to cover their costs, and to fund shooting competitions. Even with that, the cost of the rifles are much less than those sold through for-profit importers. The CMP is the best bang for the buck in getting USGI surplus rifles.