Nice bike, the Model 7 and one I would like one day.
Personally I wouldn't buy a restored bike. You pay a lot for shiny paint and chrome (and possibly sh*tty Taiwanese pattern parts!) without having a clue about the condition of the mechanicals.
Without generalising too much, amateur mechanics range from dumb to terrifying in their abilities, and what is totally spunked to you me and the next bloke might be perfectly OK to the seller...especially when he sees that a new part would cost £100.
Genuine "barn finds" are very popular and for good reason, ie no-one's had their Machine-Mart 100 piece Metrinch junior tool kit anywhere near it, and that's the way I like to buy them.