Have found that lots of girls out west have fake pics that do not reverse image search so I would not use it as too much of an indicator. Maybe in the future it will be good again when the operators that are snagging images from elsewhere move on.
1. If you do not like what you see, walk. Get some spine. If the picture is of a tall hottie and you get there and find a short, possibly chubby girl who is still dressed do not hang around thinking "it might be the same girl". Just gtfo. If more guys did this the practice would become less. Personally I wouldn't even mind paying for the girls they have, just not what they are trying to get @ 150/250.
2. Keep a list of phone numbers and reference it to ads that run fake pictures. Also take note of the wording of ads, the layout and any additional text added to the photos. Keep a list of phone numbers you contact as well as the ones that contact you back - quite often "privates" that run girls will have a different number listed on the ad compared to what you receive a reply from. This way if you see a new phone number of an ad but receive a reply from one you have previously seen you know to keep away.
3. Once you have an idea of which operators have decent girls as well as run real pictures you can make bookings.
Does this take time? Sure. But it costs very little, especially not $250 every week or two for disappointment. You have to walk.