eBay has the Rand McNally Tire Pressure Monitoring System for $50 with free shipping. List price: $80. Features wide temperature range sensors, can measure temperatures from -40°F to 257°F., wide pressure range sensors, can measures pressure from 0 to 80 psi., includes four valve cap sensors and a rechargeable TPMS receiver.
Ends 4/26 at 6PM PT. Amazon has the Auking S3 1080p Dash Cam for $47 - $19 off with coupon FGRRNNTG = $28 with free shipping. Features 168° viewing angle and a microphone, automatic recording, built-in G-sensor, the cam will save and lock the video data in case of collisions automatically.
Has excellent Amazon Reviews.