Anyone know how I can go about getting my Autograph Collection Insured? Appraised?

I have a Huge Autograph Collection. Mostly Musicians. CDs, Records, Posters, Photos and DVDs. From all types of music from 80s artists BOY GEORGE and THE JETS to more current names like THE JONAS BROTHERS and HILARY DUFF. Some of the stuff is personalized to me and some is not. I would like to insure my collection and get it appraised in case I need to sell.