How restored? Clean and tidy, or showroom?
Mine is a race bike, so its reasonable to look at but is no show pony - the tank is probably the main 'rough bit'. Mechanically its good, with a rebuilt motor and shock, good tyres blah blah.
The few people who I've spoken to about it reckon it'd sell for $1500~2000 on the open market (not that its for sale!).
Unrestored, the bikes are worth only a bit more than the value of the tank and the seat.... So around $400 to 1000 depending on how good and unmolested it all is. Obviously, a good original one will be worth more...
And a bike without seat and/or tank is worth SFA for all the obvious reasons.