It’s hard to tell from the picture,but is the key hole bunged up? If it is that will lower the value.Do you have the origional working key? If so that will increase the value. Are there any makers names on the lock or dates? Names and dates will increase the value somewhat. As you can see it’s hard to give a value from just one fuzzy picture, If you could answer these questions and post a clearer picture,I’m sure we can give you a close estimated price. Mark🙁whew):