He says it would improve home resale value and we could use 3-prong outlets (that actually serve a purpose) so things like PC's and other devices that require that plug could have grounding.Has anyone done this or have any insights? 

Taking away ground will make a device more sensitive to damage from ESD (shocks, power surges, lightening).

Do you have things in your possession worth money that you don’t need (think fancy new devices when older ones would work)?

I’m located in the northeast in a top 10 market in terms of avg house price so I was just trying to find any bit of traction I could.

Giving the numbers on your deal would probably get you a bit more traction, but there are a ton of products out there available

I’d love to start investing in Cleveland but having difficulty getting enough traction with people on the ground!

It is a low power way for devices to communicate.

You'd get a lot more traction by posting this in the correct forum: REAL ESTATE STRATEGIES > SHORT TERM AND VACATION RENTAL DISCUSSION 

Do you have listening devices/cameras in your listings?

I’m pretty much left to my own devices.