$700 is too high, These are common & come up for sale all the time. There are PF & UF serial number prefixes and consecutive serials no's out there as well.
This is worth around $500 to $575, I can see $600 to $650 for an wrapped unit, But so many of these rifles were unwrapped and fired as no one had seen an new Lee Enfield in years.
I saw one at the range a year or two ago that has a rubber butt pad installed!!! Can you freaking believe it!
Pete