Walmart offers the Stalwart Portable Air Compressor Kit
, model no. 75-35664, for $19.44
with free shipping
charges the same with free shipping for Prime members.) That's tied with our mention from a week ago (although that had free shipping) and the lowest price we could find now by $5. It features a 250-psi (18-bar) compressor, 12V DC 10A power, pressure gauge, 8.5-foot power cord, and 26.5" air hose.