How much is an uncirculated 1936 buffalo head nickel worth with no mint mark?

My informatin is from the 2007 Official Red Book, A Guide Book of United States Coins. Uncirculated coins come in different grades: Grade MS-60: Has no trace wear but may show a number of contact marks, surface may be spotted or lack some luster. Value in 2007 is $20.00. Grade MS-63: Has some distracting contact marks or blemishes in prime focal areas. Luster may be impaired. Value in 2007 is $40.00 Grade PF-63: Reflective surfaces with only a few blemishes in secondary focal places, No major flaws. Value in 2007 is $1,200.00