If anyone is curious, the reason I did not check prices of other suppliers is because I’m new to 18650 flashlights and these were the only U.S. suppliers given to me in the thread linked above … and I wanted to stick with U.S. suppliers to insure that I would receive genuine cells.
Also note that I did this comparison after I had already purchased a set of 4 at fasttech.com, and I’m happy to say Thank You to Lightbringer for pointing me to the lowest-priced supplier on this list!
illumn.com:
list price $5.50 each; a set of 4 = $27.91 ($22.00 + $5.91)
cheap-batteries.com:
list price \$4.00 which sounds great until you realize that the top style is not specified, so these are probably flat tops; nevertheless a set of 4 will cost you a whopping \$35.72 (\$16.00 + \$19.72) — making this the most expensive of all suppliers because of their extreme shipping charges. :(
mahbattery.com:
no price shown, and impossible to calculate shipping because they are sold out. :(