Q's Quik Stop #1 and #2 are both now open. I have a vendor at Yordor's (who is not stocked just yet so "open" is a bit of a stretch) and at my own place next to the Yew Moongate. I will be selling bows, armor, (maybe wood & ingots, not sure), carpentry stuff (chests, etc.) and whatever else seems to be needed. Later when I work alchemy I'll add that stuff too.
The prices will usually be 10 to 50% more than what I can get from an NPC vendor. I can make easier coin with mining/smithy so not really about profit here. Just want to help out with the economy.
The idea about having my Yew vendor sell emergency supplies will stick for a while mostly because I realize that getting something like this started takes a number of conditions being met. After a few months I may stop it but until then I will also be selling some basic goods for young players. I'll try to have stuff that is generally better than the free stuff they can get but also priced cheap enough to afford.