The first Commander was the middle series car made by Studebaker. It was previously called the Big Six, and it was only used on the short wheelbase model.
In 1937, the Studebaker Commander made a comeback as the economy car sold by Studebaker. It was the car previously named the Dictator, which probably wasn't a great name for a car during that era. I have no idea what they were thinking giving a car that name. After the introduction of the entry-level Champion in 1939, the Commander was promoted to a mid-range model.
The Commander would be promoted once again when the President model was discontinued after the war. In 1955, the President made a return was the top model, and the Commander was dropped down to a lower level, making it basically the same car as the Champion with a better V8 engine.
The Commander would return for a final time in 1964. This time it was pretty much the bottom Studebaker car beside the Challenger.
Depending on the year, the Studebaker Commander can command a high price on the collector car market. To get an idea of prices on these cars in restored or unrestored condition, check out the auctions on eBay. You can also find some parts on there.