This is taking inspiration from Gheed in diablo 2. A vendor that sells unidentified items of appropriate level that have a chance to be any rarity, the percenatage chance for each rarity obviously changing with player level.
Why I think this is a good idea is that one of the most common complaints is that you so quickly outlevel your gear in this game and it's a very fair complaint. Sometimes you'll have gear that's a few levels behind and you really want to update it but you just can not find anything to fill the slot. This is especially problematic with spears. A spear finesse warfare build may sound interesting until you realize your spear is almost ALWAYS underleveled because you just can't find spears anywhere.
This vendor could be present in every node such as fort joy, amadia's sanctuary, driftwood, etc.