Ridley's Cohort said:
Depends how much magic is floating around. Depends on how flexible you are about what to buy.
In a world like Forgotten Realms it is pretty obvious that the "one in a million" opportunity could happen every day in a big city.
Yes, if I want a very specific item like a +2 Goblin Bane Frost pickaxe this afternoon, one in a million is probably an overestimate. If I want "any magic cloak" or "any interesting weapon more magical than the one I have" and I am willing to spend a week or two, then these assertions of rarity do not make any sense.
Why exactly would the Merchant be in modern concept of a "sale" situation?
1- Magic item's don't have a sell-buy date and aren't shipped in at a rate that would necessitate a storage clearance, considering the supply issue of willing wizards vs. factory work.
2- Commodity Trusts are broken up in our world, while they could be strongly enforced in this one. Competition might be bought or killed outright instead of trying to advertise or drop prices (both of which could either attract stronger looters or imply weakness and therefore get you killed)
3- Spending a week searching for a good deal doesn't mean that some other guy hasn't gotten some better deal before you. Especially when the only time that a merchant would feel the need to have a fire-sale is when there is something obvious, like if they just had a fire.
4- A Merchant in a bad situation would have a better reason to sell to another merchant than guy-off-the-street, because the merchants like to band together for security rather than arm a potential looter.
5- Other than a catastrophe, the only other good sale reason I see is if you fell into a windfall of items, like getting 1,000 +1 swords. The kinds of items an adventurer would like to purchase are not as mass-produced and more made-to-order than Magical Soldier gear.
In the actual Middle Ages, there were very expensive but non-rare items in the form of armor and fine warhorses that were bought and sold. It might take some months to close the deal, but the typical cut of the middlemen was 10%-20%.
This ain't the middle ages.
Making a suit of armor back then wouldn't attract a horde of orcs, for one. Two there is a significant supply issue as blacksmiths are definably more common than powerful wizards.
And horses age and have specific upkeep concerns, magic doesn't.