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

Scour every home site available and even sites that are not know for home sales, but sales in general - you may be surprised.

Otherwise, you could also provide prevention recommendations somewhere on the lease that includes what you've mentioned above.Assuming you don't have a lawyer to help with your rental agreement you can find some sample clauses on a site such as Law Insider.

Great to have you on the site. 

I’m benefiting from being really close to the site of the soon to be finished Obama library. 

I want to keep away from any short cuts , I am not looking to take large cuts from sellers (I’m a true agent at heart and looking to serve my clients) .

Same with anyone who gets 20 experienced-backed responses to their question yet ghosts the thread. non response or proper thank yous on PM's have caused me to not do those anymore I might write one sentence but it is weird how common courtesy does not resonate  with so many people on SM or maybe just on this site..

You would be better served to look elsewhere for information.

The website 51west.properties also scores low on scam advisor ("owner is using a service to hide their identity, high number of suspicious websites on the server, registrar has a high % of spammers and fraud sites, website is (very) young, website appears to be hosted by a company with a bad reputation", all according to https://www.scamadviser.com/check-website/51west.properties...)Trust your instincts. 

I’d argue that a mix of custom and arcane, broker-serving laws sustains current practice, not market demand like for Delta tickets or Colgate toothpaste.