USD $10 - $150 on e-bay, but you likely will need to have a CLA on the cheaper ones.
Check out this group: http://www.flickr.com/groups/994592@N24/ Also, http://www.rokkorfiles.com/7SII.htm
The light meter is not TTL. The meter reads in exposure values (EV), then you look on the barrel to set the speed and f/stop using the EV index.
Stay in touch and I'd like to know what you decide on.