Lead sources - Best ROI?

[Jake Fugman]

Hey all, 

Gathering some feedback on what lead sources agents (investor focused or not) have found to produce the best ROI. Our team is looking to expand beyond some of the pure referral based platforms (Homelite / Upnest), and want to leverage our solid Google and BP reviews. Considering HomeSnap concierge and others that will pre-screen. Zillow is a general turn off based on their long term model but never going to rule them out. Ideally $25-50/lead.

Thanks for any input!