Sounds like the applicable parameter is $100. Pancake is just one type, the air doesn't care.

I bought a Harbor Freight one about 8 years ago to hold my valves shut when I changed my valve guide seals and all my tires have been full since. I have kids with bikes who like getting flats and I should have bought one years ago.

There's more than tires (don't forget the spare). A blower attachment is great for getting dirt out of nooks and cranneys, like around the dash.

__________________
5 speed '91 190E 2.6 320,000 mi. (new car, fast, smooth as silk six, couldn't find any more Peugeots)
5 speed '85 Peugeot 505 2.5l Turbo Diesel 266,000 mi. (old car, fast for a diesel, had 2 others)
5 speed '01 Jetta V6 (new wifes car, pretty quick)
5 speed '85 Peugeot 505 2.2l Turbo Gas 197,000 mi. (wifes car, faster, sadly gone just short of 200k )
5 speed '83 Yamaha 750 Maxim 14,000 mi. (fastest)
0 speed 4' x 8' 1800 lb Harbor Freight utility trailer (only as fast as what's pulling it)