I guess it will depend on the prices the CMPsets and the number of each condition they have. They usually price things to sell. The sale of 1100 or so M1C's will probably bring the going price for an average M1C rifle down some, although top condition rifles seem to always be strong.
The demand for original scopes and mounts will undoubtedly increase with the release of that many rifles, even with the repro units that have been discussed. That increase will probably offset any drop in rifle values.
Cass