Personally, I use this is a tool to not just wholesale, but to also set appointments if they do want to put their home on the market.

A buy box is a tool real estate investors use to determine the types of properties they want to purchase.

By use of THEIR pricing tools.

This is an important tool for anyone buying a tenant-occupied property.

You really should provide a disclaimer that you are “shilling” for Jerryl Norton with a link to his website selling SEO services in your profile.  

Get your own website together and get it set up for robust SEO with someone that actually knows what they're doing (@Jerryll Noorden here on BP). 

Imagine you wanting to sell SEO services for real estate investors right?

But the software will give you some structure based on best practices, and that can be a huge tool for learning the game, especially if you're self-managing.I've not tried avail so I'd genuinely love to hear how it goes for you.

Use several rent estimator tools to get an idea: Zillow, as noted above, Hemlane is another one. 

A 1031 exchange is a great tool to help investors like this get out of something and cleaning get in to something else with virtually no tax liability at the beginning.