Just something I stumbled across. Perhaps someone here may find it useful. Know nothing about the product and its quality. Availability may be limited and is of course only available with TrueValue stores.
Will try to remember to delete this post at the end of next week or thereabout.
Peak 3-Color Garage Parking Sensor for $0 after rebate + pickup at TrueValue
TrueValue offers the Peak 3-Color Garage Parking Sensor, model no. PKC0RJ, for $10. This $10 mail-in rebate cuts it to $0. Opt for free in-store pickup to avoid the $7.79 shipping charge. That's $16 below our January mention and the lowest total price we could find by $8. The sensor changes colors from green to yellow to red to indicate distance and requires four AA batteries, not included. Rebate expires June 24.