buying sites

Hi all, which index to check for buying sites less than $100 also if the site has a good archive.org profile. thanks

It quite interesting flippa got some changed lately and less boring than before. I dont know if it proper to ask it openly, need you guys and pro like meathead give me some more opinions. My friend from UK she has some money to invest and bough some sites from flippa, I did have a look at those...