MerricB said:
Which part of "PCs sell magic items for half-price, NPCs sell magic items for full-price" do you not understand?
The page number that that quote comes from would be a good start.
I also wonder if you are misidentifying what is going on. Let me use an example which I think everyone can be familiar. "Game players sell games for half-price. Game store owners sell games for full-price" Does this imply that there is some unfair principle at work which gives a game store owner some unfair advantage over me, or is it rather that the difference comes from the nature of the transaction.
Let's say I sell some MtG rares to a game store owner. If he's willing to buy them at all, he'll probably only pay me half of what he intends to sell them at. Why is that? Because he's accepting some risk in buying the item. The item may not sell at all. The item may not sell for quite some time, during which time his monetary investment in the item is tied up and useless to him. Before the item sells it might be stolen, or it might turn out to be stolen, or it might turn out to be fake. In order to find a buyer, the owner must pay for a property and advertising so that buyer can find him. This is called overhead. In the end, the owner may only realize a 4% return on his investment in purchasing your cards, and from this money he must then support himself and his family.
So is it unfair that the owner buys the card from me for only half of what he sells it at? Is it unfair that 'game players' sell games for half-price? Not really. If I wanted to accept the risks myself, I could go out and try to find a buyer for it other than the reseller. It might cost me significant time and a certain ammount of resources, but if I established myself in a business there is no reason in theory why I couldn't sell games for thier full market price.
Likewise with PC's, NPC's and selling magic items. PC's could certainly sell magic items for full price, if they set up a shop, established a business and a reputation, and waited around for a buyer. I don't see anything in the rules that precludes this. I don't see the rule "PCs sell magic items for half-price, NPCs sell magic items for full-price" anywhere in the DMG. But PC's are typically in the position of game players selling thier items. They have no real leverage and they want or need the cash now rather than later.
Incidently, this is yet another reason why magic item shops are unlikely, or at least that commisioned works are far more likely. I can't imagine crafters are going to be glad to risk dead inventory or not being able to sell the item at market price for lack of eager buyers. Not at least, if they are investing XP.
While I'm looking through the DMG, I thought I'd quote a few interesting passages:
"Magic Items are the hallmarks of a legendary campaign. They are gleaned from the hordes of conquered monsters, taken from fallen foes, and sometimes crafted by the characters themselves."
Oddly, no mention of large discount stores.
"Including magic items as part of treasure is a vital task of the DM. It's also a delicately difficult one."
Don't you think it particularly odd that it would say that, since if magic items are only commodities to be freely bought and traded, presumably a DM could forgo this delicate difficult task by just leaving around enough coin and letting the players do thier own shopping?
"Occasionally however you'll want to give your players items you have hand-picked as especially suitable to thier characters. Feel free to do this more and more often as you gain experience as a DM..."
Oddly, the DMG makes no mention here of letting the players hand pick thier items.