With the lack of indexing recently here on Ukp i have been using Vivastreet to search out the indies on AW.
Most Foreign, mainly ee and latin , and some others on AW can usually be found on Vivastreet too. The name of the ad poster can give you some clue as to if the actual girl posted the ad, Click on that name, or sometimes just a number, all the ads posted by that pimp/person come up. Often quite a few and obviously not indie.
Not a full proof plan as some can get clever and post individual ads, but it does give some good intel and sometimes more info than you can find on ukp.
