for Gio we traded cole (bonus baby), Norris (Bowden GM when drafted), Peackock (Bowden GM) and Milone- so I guess there's your example
for Fister we traded a bunch of Rizzo picks, and everyone, you included thought is was a steal- can anyone even find a legitimate source saying otherwise?
for lobatron, we traded a rizzo pick for a back up catcher, so to the extent you consider karns a 'prospect' we traded him for a backup catcher