For the air10, it's the Cheapest 12v (cigarette) powered compressor that's solidly built, compact, with an auto stop that's actually accurate.
Cheapest they have ever been for air10 and air20. Repco seems to be doing a double discount or something, as the air10 was $169 on special last week.
Supercheap for context has these on special for $303.20 for the air20 and the air10 for $191.99.