I hope that means buy one, get one half off.

LOL, not quite how I'd advertise it, but...

Our lettuce, iceberg or romaine usually keeps ok for about 7-10 days. Might have to trim it a bit towards the end. If it starts to get bitter, a soak in cold water for an hour or so fixes it. What matters is how old it is when you buy it. We've had some go bad in a couple of days, while farmers market fresh lasts for 2 weeks easy.

It's obviously not a solution for everyone, but if you can afford a Sub-Zero fridge, get one. They seriously keep food fresh for 2-3 times as long as conventional refrigerators. I think it has largely to do with negative pressure, precise temperature control and tight door seals.