looking for info on public records; rent, sales history, etc

[Steve Chenoweth]

I checked out some of the resources from the “RE Law and public records” section. I think it’s helpful, but I’m also trying to research some different aspects of an area; updated rent records, RE sales history, market values, property taxes (local/state/federal), crime rates, etc., anything important about the area in which I might make a purchase. I feel that a decent amount of research of the area(s) can maximize my potential for profit.
Can you find any of this info online or are some of these documents going to be physical copies at the township/county offices? If anybody can point me in the right direction I would really appreciate it.