SI reported a story recently about a minor leaguer who was traded for 10 baseball bats. Granted these bats were maple, but still. They retail for $65.50 if you buy 6 or more so essentially this player was worth $655 to his team. Of course, at the time there was also an immigration issue holding up his joining the team so unloading the contract made sense.
Now, I figure we can get at least 12 bats for Farnsworth, 3 helmets, a bucket of official major league baseballs, and a bucket of sunflower seeds (in case Victor Martinez is feeling moody).