Walmart has the Goodyear Heavy Duty 120-volt Direct Drive Inflator for $39 with free shipping. Features a 150-psi output and comes with adapters for use with automotive tires, bike tires, sports balls, and mattresses.
Has good Amazon Reviews, where it sells for the same price.
Walmart has the Magellan RoadMate 5320-LM 5" GPS with Lifetime Map Updates for $37 with free shipping. Features 5" touchscreen with sunlight-readable display, compatible with cars, SUVs, RVs and trucks, free lifetime maps and traffic updates.
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.
Walmart has the 2-Pack Campbell Hausfeld 12V 2-in-1 Inflator w/ Flashlight (RP317599AV) for $20 with free in-store pickup or $5.99 shipping to home. Includes built-in pressure gauge, light for roadside emergencies, 2 inflation nozzles and 1 inflation needle for sports balls.
eBay has the Drive Auto Products Car Trunk Storage Organizer w/ Straps (17" x 23" 10.75") for $17 with free shipping.Retail price: $50. Has excellent Amazon Reviews.