I just picked up a $30 inflator at WalMart over the weekend. Yes.. I have turned to the Dark Side I live in the middle of nowhere by my state's standards.. and have a limited selection of stores to go to.

I forget the maker, but its blue and seems to be a rather common/standard Wally-mart item.

It has a built in battery which can be charged.. to run the compressor. The inflator gauge can be set to a certain PSI via a dial. Very convenient. Comes with a few attachments. Has a DC adapter to plug into a wall socket. Has a lighter plug to power from the car. Has a flashlight built in.

I saw a smaller model for $10, but it seemed too tiny (and likely slow). This $30 one filled an empty tire in 5-10 minutes or so. Relatively fast.

-G