How much is a Ralph Waldo Emerson signed book worth?

I have a very old copy of Ralph Waldo Emerson's book 'Compensation' and it is from the very early 1900's, possibly the late 1800's. The book is signed on the first page by Ralph Waldo Emerson. It has his signature, and something else he wrote that I can't quite make out. Does anyone have any idea what the value of this book may be? Or somewhere I can get it appraised? Thanks so much. (10 points to best answer)