Welcome to Treasure Net !!
Before you can determine an estimated value, you first need to determine it 'grade'.
Here is one grading company's guide to determine your coin's grade: https://www.pcgs.com/photograde/#/Walker/Grades
Don........
Going by your photos, I would grade it F12 overall. The reverse is a bit better than the obverse, but, there are scratches on both sides, so, value might be a little less.