BigSky Tool offers the factory-refurbished Hitachi 4-Gallon Portable Electric Twin Stack Air Compressor, model no. EC89, for $93.50. Coupon code "FHAT23" drops it to $79.48. With $8.98 for shipping, that's $10 under our July mention of a refurb and the lowest total price we could find for a refurb now by $89. It features an oil-lubricated cast iron pump, 13-amp induction motor, 2-gallon capacity, cooling fan, and more. A 1-year Hitachi warranty applies.