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$800 is way too high for an average used No.4 Lee Enfield. There are a couple of good ones on the EE right now and the asking price is $450 and $500.
Without good pictures of the rifle, a better description of the condition, the Manufacturer, and pictures of any markings on the rifle, then anything here is speculation and an honest evaluation can not be made.
One of the problems here is that someone has an "average" firearm and wants to sell it, so he looks it up on the Internet. As the Seller, he is probably not familiar with the various Makers, models and markings so to him, it is the same rifles as the pictures. The rifle he has looks the same, so naturally he wants the most money he can get. As mentioned, a scarce Irish Contract rifle might be worth $800 and a beat up rifle be worth $200. Which price do you think that person will ask, and insist that HIS rifle is worth the top price because it looks the same as in the pictures on the Internet?
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