Something weird I noticed in the DMG, specifically the community wealth & population section, page 137. The example for max value of x item you can get based on how much the town has is 30 longswords for a hamlet of 90 people.
1/2 the max spend on 1 item + 1/10 the population.
This means that at any given time, a metropolis with a population of 25001 people, the smallest possible, will have, readily available, 8,333,666 longswords.
(100,000 limit / 2 * 25001 population/10)=50,000*2500.1= 125005000 gp worth on longswords.
Longswords cost 15 gp, and 125005000 gp/15 gp per sword = 8333666.6(repeating) longswords.
Bring this up next time the DM complains about you buying in bulk, or if you want to know why they have over 300 swords per person.
Seriously, what the hell is this.