It depends on too many factors. Mint (NO scratches), with box and papers is about $900-$1000. If I have the correct mental picture of the one you're looking at, probably about $300 less.
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D. Kamm
USGI M1911/M1911A1 Pistols Website
http://www.geocities.com/M1911_M1911A1
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D. Kamm
USGI M1911/M1911A1 Pistols Website
http://www.geocities.com/M1911_M1911A1