What are the best ways to self discover the cap rates of a area?

[Fritz Ritter]

Most books and podcast suggest going to brokers to ask and discover local cap rates. However most books and podcast also make it seem like the brokers hate tire kickers and wont work with you if your not at that moment ready to close on a deal . I feel like there is a website or sites we could look at to do our own recon before we decide that area is worth trying to build a team in . We have already done a lot of research on pop increase , wage growth , job growth , % of renters , crime rate , etc. ( all from city-data, census , best-places , IRR). Are there any out there that I'm missing ?