My concern lies in how can I mention this duplex or attached unit in a rental post, without making it less appealing to prospective tenants?  

It's a market shift, be grateful on the times you had but numbers don't lie.

And not knowing they are not getting title insurance for that extra 50k they paid and buying as is from someone who usually if not straight out lying about the comps or condition is certainly puffing.

There are some companies that will lie to you just to close a sale and others that will be honest knowing that individual buying parameters vary among investors. 

They lie and say they are "TCPA compliant" but they are not. 

One thing that would be helpful to investors from the professionals is hard data, the statement numbers don't lie, carries weight as long as we do not make them lie.

My strengths lie in numbers, research, and patience.

While you might think that there's nothing wrong about getting paid for a referral as long as it's good (I've never done it myself), the problem lies elsewhere: you have to understand that their opinion or advice could be biased or first and foremost in their own self-interest, especially if they're not disclosing their financial interest.

gosh, this is awful, as I am finding out, they want your money but lie about they're there to help you.

The judge will look at them with an evil eye when they lie to the court.