Canon 24mm Tilt-Shift lens, 1-week rental: $40
Credit left on ticket for T from a couple weeks ago: ($6)
Prudential Observatory, 50th floor, admission price: $12*
Unused AmEx gift card: ($100)
Parking in work garage with shuttle to downtown Boston: Free
Discovering more than a week of vacation time that must be used before January 1: Priceless.

* Excludes student discount. My student ID, it turns out, does not expire. But probably worth $2 to not get thrown out.