When methamphetamine replaced crack as the great drug scourge in the United States, Dr. Hart brought meth addicts into his laboratory for similar experiments — and the results showed similarly rational decisions. He also found that when he raised the alternative reward to $20, every single addict, of meth and crack alike, chose the cash. They knew they wouldn’t receive it until the experiment ended weeks later, but they were still willing to pass up an immediate high.
So there is some non-infinite price elasticity. The characters from Breaking Bad could use the implied elasticity to set profit-maximizing prices.