Went to Sam's Club tonight and I made note of the gas line. From the time I went in to the time I got out was 23 minutes. The car at the end of the line was first in line when I got out, so they spent 38% of an hour in line for gas.
The gas was 39¢ cheaper at Sam's Club than the local gas station.
The average car is about 15 gallons, so let's assume they're close to empty and filling up 14 gallons worth of gas.
14 gallons x .39¢ = $5.46.
$5.46 ÷ .38 = $14.37/hour. By waiting in line, they're valuing their time at $14.37 per hour.
Is this something you do or would do? I fill up before my tank hits half empty so I don't mind paying a bit more per gallon.
Edit. If you take into account the 5% cash back rewards on gas bought at any station, the lower gas price per gallon at Sam's means they value their time at $13.63 per hour.