I agree with JP@AK mismarked revolvers do not warrant a premium and sometimes maybe a bit less,
the problem is the 36 and 36-1 did not have identicle frames ( like the Model 17 and 18 frames are different to meet the wider barrel rib).
So unless you can prove the gun left the factory mismarked with a letter the prospective buyer does not know if someone swapped a 2" barrel onto a 36-1 frame .
Post a few pics so we can determine if its a 36-1 frame or mismarked 36
here is a comparison of the frame and barrel rib differences.