Valueing signed photos help please :)

[spellbound]

Hey I use to come on here all the time from 2006 to 2011 and absolutely loved building on my collection of signed photos. However now i'm in a situation where I really need start up money for a business and can't help but wonder what my collection is worth.
Some I won't sell but there are about a 100 I would. Anyone any idea what these would be worth?

An A3 poster signed by Zac Efron, Vanessa Hudgens, Monique Coleman, Lucas Grabeel, Olesya Rulin. I got this in person so know its genuinly authentic, I went to a signing in Oxford Street in the promotion of HSM 2. I've seen zacs and vanessas go seperately on ebay for around £70 but is this realistic? Would this be worth more than that?

I have two JKR signed photos which I believe to be geniune. One is slightly smudged on the autograph which I think will assure people it's genuine and not a print. I won't sell both because they mean the world to me but how much would one be worth? I also got some bookmarks and things from jkr with a standard letter and FAQ so shows it was from her.

I have 40 eastenders cast signed photos but im assuming these are not worth very much? Maybe better of selling as a collection? Mainly older cast ones.

How much am I likely to get for people like Richard Griffiths, Rob Pattinson, Keira Knightly.

Also do people buy them if personalised?

Thanks for any assistance! I don't want to sell my photos for the sake of it but if any are worth something then it makes sense too. I have over 200, all on my website http://rosiesautos.webs.com/

Rosie

[C1RQU1T]

It all very much depends where you sell them and to whom you sell them to