Sell Exclusive Lindsay Lohan Photo?

I have 50+ exclusive L.Lohan photos that I took. Some pics I have.... partying, backstage on movie sets, drunk at clubs, hung-over morning shots and pictures of her lounging in her apartment. I was close with her and enjoyed the friendship until a recent falling out. I never really thought about selling them until now, and I dont know much about the market because I never payed attention. Nobody else has these pics. Does anybody know the best way market these...selling to mag or middleman? And, how much, average, do people sell pics to tabloids for.....whats the best way to negotiate price?