How much will handwriting on cover effect value? 0

[Eaglize]

I recently inherited a collection of Golden Age comics. I would say the conditions range from Good to Fine. But to my dismay I have noticed a handwritten "p" in the upper left corner of each comic. How much devaluation will this handwritten "p" cause?

 

[marvelmaniac]

The "Overall Grade" of the book will be the determining factor on how much if at all the initials written on the book will lower its grade.

The condition of the book shown above looks to be a VG 4.0, initials written on the cover have no affect on this grade or lower grades.

4.0 VERY GOOD (VG):  Back to Top
The average used comic book. Cover shows moderate to significant wear, and may be loose but not completely detached. Cover reflectivity is low. Can have moderate creases or dimples. Corners may be blunted. Store stamps, name stamps, arrival dates, initials, etc. have no effect on this grade. Some discoloration, fading, foxing, and even minor soiling is allowed. As much as a 1/4" triangle can be missing out of the corner or edge; a missing 1/8" square is also acceptable. Only minor unobtrusive tape and other amateur repair allowed on otherwise high grade copies. Moderate spine roll may be present and/or a 1" spine split. Staples may be discolored. Minor to moderate staple tears and stress lines may be present, as well as some rust migration. Paper is brown but not brittle. Minor to moderate interior tears may be present. Centerfold may be loose or detached at one staple

[revat]

yes, for comics that old in that condition, very little effect on grade.  As for value, probably somewhere in the 0-5% range of impact.  Of course if we're talking about a comic worth $10K, even 2% is somewhat significant (to some people).  If you're talking about "commons" worth $50 or less, probably no discernible impact. 

[theCapraAegagrus]

I feel like the board has answered this same exact question 20 times in the past 6 months...