Is there a way to check weed prices around the world for traveling?

Hey, im just wondering if there is a site or way for me to get a basic idea on weed prices around the USA and Canada, im going to be traveling a lot this year for work. Any Ideas?

There is a site that has cities you can click and it tells you where to find it and prices but I can't remember it right now,im sure someone will post it though.

A good thing to go buy would be 10-20 a gram for exotic and 5 for regular.Im sure it's different in medical states though.