Scarcity, correctness and condition are not the only factors. Value can also be based upon location. When I started traveling to gun shows in the early 1970's I learned a very valuable lesson.

When I attended the OGCA show (Columbus,Ohio) the Standard Products carbines were in greater demand and brought more money. At the Detroit, Michigan gun shows, the two Saginaws were the prime interest. When I attended the Stratford and Glastonbury, Connecticut gun shows, the Winchesters were the most sort after. By the early 1980's I was attending gun shows in the Poughkeepsie area and IBM's were going through the roof.

Sometimes location can increase the value and desire of a particular carbine.