Lincoln Prints

I have two prints of Abraham Lincoln.  My grandfather gave them to me.  He said they are very valuable and claimed that one of them was signed by Lincoln.  They are in old, and what I consider ugly frames.  On the back is printed in red, "From the collection of B.F. Stein."

May I send you pictures and see if you are able to appraise them?  I have had them for 50 years now.  If they are worth a lot of money, I would rather sell them to someone who would enjoy them.

Thank you for your consideration.

Good