I didn't articulate very well ... I was just one cup into the day. Sorry.
Maybe a for instance ...
I was reading a classified for a handgun and the owner advertised it at $750 cash and $900 trade.
So if I had trade fodder and it's FMV was ~$750, would I make the offer?
If I do, I have over-inflated the value which is the exact same thing as the seller. So what is the point?
That's no different than a car salesman offering you $1000 more for your trade-in and inflating the sales price of the new car $1000.
I'm not grasping the reasoning behind that marketing strategy.