Best way to find rental rate for a house?

[Sadi K.]

Hey guys, wanted to hear what tools are you guys using to calculated expected rental rates for a property ? 

I'm using a combination of : 

- Zillow estimates : these seem to fluctuate quite a bit, so not sure how much to trust the "ZEstimate"
- Craigslist : just look for postings in the area and use photos to get an estimate
- Rentometer : usually seem to be pretty good, but does seem to lag a bit 

Any other good tools you guys have found ? Ideally would love to be able to do a geographical + historical search on craigslist + postlets - but haven't found something like that yet..