I like the idea of pre-foreclosure especially, but have not found up to date data for that specifically.

I'm curious if this discrepancy is typical of other regions as well.How accurate is the data on this site?

A few posters have commented that data-driven pricing doesn’t work. 

Whether you’re looking at SFHs, duplexes, or other properties, it’s important to pair on-paper data with boots-on-the-ground knowledge to really get a sense of values.If you’re considering anything serious in Detroit, I’d recommend connecting with someone who knows the market inside and out.

@Chris Seveney - Where do you get your data on US treasury demand - per your "very weak demand" comment? 

I do like all the data that Stessa provides for investors.

FYI They just posted their Semi Annual reporthttps://www.sec.gov/Archives/edgar/data/1667307/000168316817002618/american_1sa-063017.htm?

In retrospect, I could have driven 10 minutes from my house and found good deals. 

After inputting all the data, they provide a review that includes cash flow, Cash-on-Cash (CoC) ROI, and even a graph to estimate the property's growth through appreciation, yearly cash flow growth, and loan paydown.

Both programs can aggregate data based on filters like zip codes, sell scores, etc.