I can not find any reference it any Catalog on a Crosman model 37 pistol. Crosman makes a 357 version and a 338 version. Check your information again an re-post your question. ( it is possible that my catalog's are missing this model. )
See the link below for the Crosman 454 Owners Manual.
20-80 USD or so
25-50 dollars
Crosman 38 C combat In very good to excellent condition it is bluebooked between $75-$90. Add 20% for original box. Add 200%-400% for the chrome salesman sample pistol
Crosman is owned by Wellspring Capital Management. They are a privately owned company. They are located in the Leaver House in New York.
The Blue Book of Gun Values will give you a ball park. They don't show up often for sale.
The CROSMAN 760 Powermaster started production in 1966 then went through 8 different changes and ended in 1991
Jiminez Arms
Your 38C Combat is a replica of a S&W 38. There were 2 variations made. It was manufactured sometime between 1973 and 1981. The value can not be determined because you have not stated the condition of the pistol.
Between $75-$100 is a common price today.
Swiss Arms, UTG, BSA, Daisy and Crosman
It most likely refers to a pistol by Kahr Arms.