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Neil Armstrong is one of the most desirable autographs of any 20th century figure. While many dealers describe his autograph as rare, it is hardly true. Neil Armstrong signed autographs freely for over 30 years -- in-person and through-the-mail. At the height of his fame in the 70s, it is reported he received hundreds of autograph requests per week and signed them all. However the hige demand of this autograph has made a very desirable and valuable one.
Regarding the value of your item, I have just perform a market research of similar sold items as yours. I performed the research based upon the most recent finished auctions and private sells, so the value given is the real market value of your item. This is the only way to know the exact value of your unit.
The value will be in the range of 1,000-1,600$.
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