Posted By:
DaveI always thought there was a premium for these, but Trae doesn't use one for his estimator at http://www.mlbvintage.com/t206/.
The T206 museum suggests a multiplier of 1.4 for commons with the fac 649 overprint, and 1.3 for the commons with the fac 42 overprint in the 460 series. Stars have no increase for either overprint.