If there is a slice in the paper over the action body and the serial number is visible, there is a possibility that it is one of the rifles imported from Ireland (though to be fair there is some dispute regarding the official records by folks who really know the English MOD inside and out).
if curious this page might help, look at post # 61 for the serial number and what it indicates.
Fritz's FF marked Enfield sticky - Page 2
Now the value of these arms will be reduced a bit if you take the rifle out of paper and clean it up, by around 150~200 dollars, as a new example sells with no paper covering sells for around 500 to 550. once used and dinged up, even a to a slight degree the value drops another 50 to 100.
That said what it the value of the rifle sitting in a box to you? The mind set of a collector compared to a shooter is quite a bit different.