I could never understand where the merchants were getting the money to buy the magical equipment from. In the campaign I will be running, there won't be any magic item merchants.
That’s you choice, however:
1. I would like to think that the price for magical items is high because there is a damand for them.
2. In a medieval European feudalistic society the demand would come from the gentry (knights), nobles, monarchs, guilds, churches, and wealthy merchants.
"So, I have been in the grain business for years, shipping grain up an down the shores of the land. I now have 5 sailing boats working for me. Last night some adventurer wondered if I could cough up the coins to buy a [+5] dwarven armor he found. It was really shiny and such.
I spent a couple of weeks and managed to sell my sailing boats for 50,000 gold. The adventurer said he wanted more for it, so I borrowed 15,000 more gold against my good name and so we had a deal, the adventurer and I.
The man I sold the boats to are moving them to another land, so I dunno who is going to ply the waters with grain, but that is not my problem I have got my dwarven armor that surely must be worth 325,000 gold!
Okay ways this would be possible:
1. The merchant wanted to consolidate his heaps of gold pieces into one portable suit of armor.
2. He has an important customer who wants such a suit, and does not care if he makes a profit on it, as he will earn brownie points with that important customer.
3. Its crafted value is 325,000 gold, and he can move it for 110-140% that, and not have to wait for the crafting time.
Now I only need to find an IDIOT who would pay me 325000 gold for the armor and I am filthy rich."
1. The world of full of idiots.
2. Idiots have money.
3. Something is worth 325,000 gold because someone is willing to pay 325,000 gold (the demand part of supply and demand).
If you look at the item prices you will see that at for instance the difference between a +5 tombforged armor and a +4 tombforged armor is 5x. So, if you want to make any +4 armor out of a +5 tombforged armor, go right ahead just make the +5 armor into residium and you can reforge it.
This was the design they had in mind. However with the rules as written one cannot trade the same level item no matter what ones charisma or diplomacy happen to be. I think this is stupid.
Personally the prices in the PHB for high level armor just reminds me a lot of when I played poker in Italy with 10,000 lire bills... It doesn't feel real.
Yeah the prices can be a bit out of whack.
So, since there isn't any way to buy/sell magical gear, I won't have to give the players ridiculously large amounts of money, which again means that money will actually have some value. You can maybe get enough to buy/build an inn, manor, castle, or something like that. Instead of being able to ... well... take over the world. Which feels silly. Now I have never liked epic play, or anything like it, but level 1-20 dnd 4th edition looks good.
The amount of trade units a bit of currency has on it has no bearing on how useful the currency is . . . unless it is heavy as all get out. I however convert gold values into silver, and then make gold worth twenty times that of silver. On top of that I make 240 coins in one pound. That way you do not need a weal barrow of coins to buy something.