pawsplay said:
Experience tells me that a middle school football game concession stand can get the same buck fifty for a Coke that McDonald's gets.
True, but we aren't talking about low cost, easy to acquire items.
Imagine if you had a Ferrari. That's something a decent number of people would love to have, but it was really expensive to make and it has a lot of value.
Now, imagine you had no phone and no internet and wanted to sell it. Some people might know someone who has the money to afford one, but it is unlikely. So how do you find a buyer? The only thing I could think of is trying to drive around until I found a dealership who was willing to buy it off me since they had the connections to find a buyer. They likely have a list of former clients with their addresses and those people might have friends who want to buy one as well.
The same thing applies to magic items in a D&D game. You might find a merchant who has ties to the King of Kingdom A which is a good month travel west from your location. The merchant is allowed entry to the castle due to an agreement that was passed down from the King's father because the merchant's father helped him out one time. The King trusts that his good are what he says they are since they've had dealings in the past. Plus, he knows wealthy nobles in town B, city C, and kingdom D just in case that King doesn't want it.
The merchant is willing to buy the items, but for a lot less than he'd sell them for as he has to hire guards for a trip that long through the wilderness and they cost money. Plus the cost to feed them and the danger involved.
So, you have the choice of either:
a) Traveling the world for as long as it takes to find someone rich enough to buy them, find one who has an interest in it, convince them that you are trustworthy enough to hand over a large amount of cash to, then sell the item for full price.
b) Sell the item for 1/5th the value to the traveling merchant who is in town immediately with no hassle.