You can try this one. I have done it for an appraisal agency 2 months ago, but i have changed it a bit now http://www.scriptidea.net/linkappraisal
Its a really nice Script. but the price is little Expensive. I wish to buy 1 copy if u give some discount.
I have reduced the price of the script but contact me and send me your offer for the script. thanks Mike
thanks Nickspain, i have add some feature and update some coefficent for domain appraisal calculation. I hope it help to give you an idea of a site value, even if is an automatic appraisal and can't take on mind extra incoming that of course are very important to appraisal a site. Mike