There used to be a website a long time ago(~8 to 10 years ago) where people used to post which streets/corners to buy dope in different cities as well as listing current prices and opinions of quality for different kinds of dope. They also listed rip offs. It was pretty good. I wish I could remember the URL but after 6 months the site disappeared and never saw another one like it again. I found a couple last resort places to cop when my local dealers were dry at the time through that site. It was funny that one time a guy I knew told me he would show me a really good spot to cop and he ended up taking me to one of the spots I found on that site.

That's the problem with having the information in the public domain, cops know how to use computers too.