Signed Copy of Flashback

Hello everyone, I am a long time fan of KOTLC, however I have kind of not been thinking about it for the past few years but slowly and rediscovering my love for the stories. After going through my old collection, I've remembered I own two copies of Flashback- one of which is signed while the other has the exclusive chapter from (I think) Fitz's perspective. If I were to sell one of these, approximately which one would be worth more and by how much? I'd really like to get some money from it to afford nice hardback editions of the newer books!