Not really... base price is already included in the box next to the coin icon. Buy/sell price, of course.
Just one additional line it was for bartering. It didn't show attitude adjustment, but yes, that's also a good addition to add to the UI.
Can't say I found that flooded rather than extremely useful.
@ Wayward;
That's... weird. If you hover over your characters icon in the RPS many what buildup did it show (base 3 + charisma + option modifier)?