I was storing some alcohol and tobacco at first, but now I'm wondering if there will be enough demand for these things if things get really bad. If people are desperate, these won't be their highest priorities.

I read Ragnar's Urban Survival recently, and here is his list of barter items to stock up on: ammo, soap, medicine, toothpaste, toothbrushes, toilet paper, underwear, aspirin, pens, pencils, paper, cooking oil, salt, wire, fertilizer, gloves, tape, knives, sharpening stones, matches, saws, files, oil, engine filters, canning lids, freezer bags, electrical supplies, nylon rope, batteries, lamp mantles, flour, yeast, detergent, needles and thread, tape, bleach, antacids, sugar, nails, screws, bolts, and shoelaces, among other things.