Target offers the Vicks Vaporizer with Night-Light for $12.99. Opt for in-store pickup to avoid the $6.47 shipping charge. (Amazon offers it for the same price.) That's the lowest total price we could find by $7. This 1.5-gallon vaporizer features an automatic shut-off, built-in night-light, and 18 to 24 hour run time.
Fry's Electronics offers the iRobot Braava 380t Floor Mopping Robot for $239.99with free shipping. That's the lowest total price we could find by $60. This cleaning robot dry and damp mops hard surfaces and tracks where it cleans to ensure complete coverage.
Update: It's now available for in-store pickup only.