Best wishes for a successful recovery!
I wanted to add a comment about the subjects determining the value. Post-mortem photos are becoming popular with collectors. So are animal photos and of course anything with a Civil War soldier, especially one who is identified. The more unusual and appealing the subject is, the more collectors want it. Fancy cases also affect the price. You can get a good sense of price from the daguerreotypes on Ebay. Standard, unidentified portraits don't command such a high price unless the subject is very good looking and dressed to the nines.
