What is the value of a 357 mod 65-2 smith and Wesson?

You have only provide a generic description. Trying to put a value on anything with just the limited information provided is hard to do. Value depends on a combination of many factors. Without a detailed description to include, finish, barrel length, overall condition, stock material, sights, box, original paperwork and any accessories, only a general estimate can be given. This weapon could be in the 100-525 USD price range.