Ok, just preference and experience. Unless you are dealing with a super expensive ultra rare rifle I would let the FTR have 0% priority on the price. Some folks may prefer it without the FTR, but FTR is a military arsenal mark. Even if it is a wartime gun, the FTR is really only a sign that it was taken care of while in service.
There are ofcourse, always exceptions to the rule. Generally, if you are selling it, the FTR is provenance of the great care this valuable antique received while in glorious service. If you are buying it, the FTR is a sign that the old junk gun was plum worn out and had all its original parts replaced.
For more oppurtunity to bicker, SEE: Japanese rifles with ground mums.
I own firearms not to fight against my government, but to ensure I will not have to.