Good addition! Best bartering items wont be precious metals, but silver would likely be better than gold because of even a small amount of gold is so valuable it would be hard to barter. Precious metals will be little more than fiat currency during really bad times (but not bad and would return to having real applications again when stuff gets better). Best bartering items would be hard alcohol (like you said), guns+ammo and certain medical supplies. Also a bunch of inexpensive but strong knives would work well. Bic lighters would be great. Oil lamps would likely become high value. I'm going to put some effort into this sub to really provide resources for people looking to prepare. The most people prepared, the safer we all are. Anything else you can think of?