Variables,variables,variables,LOL ! So so many roads to go down. How Original, how many matching parts versus correct parts. Key factors would also bbl wear/muzzle wear,,etc! Gunbroker is OK as long as the seller is "Honest" and states facts, not feelings. Documentation is King and having the rifle gone over by someone that really knows what there looking at! I would also recommend the CMP Forum,there are some good guys over there. There are tons of books and information on the web so get after it, LOL With all that said yes I agree, many M1s sell for $1000++ on GB but you can buy a nice Service Grade @ CMP for under $800 shipped and there are some nice rifles coming out of the CMP. Do your research and let us know how ya make out!