I know it is not possible, would you trade a Jules Verne for an Oliver Twist, or a Circumnavigator for a Sunken Treasure??

Wouldn’t it be nice to be able to trade badges. If you had a __Jules Verne__ for example, would you trade it for a _ Circumnavigator_?
Would you have to have more than one before you thought of trading; meaning you would not trade your only one. What badge would you trade for what other badge? For example would you trade two Gold Ingot for one Ernest Hemingway, etc?