Berry, I just noticed your inquiry about Fitz Lee book and its value, and thought about sending you some comments. His book contains some previously unpublished letters and firsthand information about Gen. RE Lee, and Tom Broadfoot's 1996 "Checklist" of Civil War books and prevailing prices put it at 40 dollars back then. But if by value you had only price in mind, Google Books can let you read the entire thing, page by page, on-line, free.