LOL... I'm really fond of BACON! Nothing motivates a pup like delicious smelly, tasty treat. Hot dogs run a close second. Actually, once the pup gets the concept of being "rewarded", a piece of kibble works well...
For basic manners, including trades like this, I don't use food. I prefer a really high value toy, instead...something that requires play with me, since I know that's what the little mite wants.