Do any other games have a market like this one?

I can't find the thread but someone estimated there was 70-80,000,000 "Pax" generated daily. Moneymakers are mostly the Signets (kinda high-level enhancements) that you get from Nightmare level raids and PvP action.
There's only one trading house in London, and no remote trading house.
Not sure if you can email stuff either.

From what I've seen there is no housing, and personal storage is "bags", which have a cap. Don't think you can trade between your own characters.

Right, so I found the thread, it's called "Runaway Inflation"

http://forums.thesecretworld.com/showthread.php?t=57308

Expenses:

Repair costs
The Auction House's cut
Taco charges
Pangaea clothes (some of them aren't all that cheaper)
Inventory size increases
Gear manager slots
Raid markings
Other miscellaneous stuff like flashbangs

(Tacos are like inspirations with multi-uses from what I understand)

Estimates by user Kagerota00:
(Italics/bold are mine)

"So. for easy math, lets say the game is generating 1000 Pax every second of every day. This is probably an Exceptionally low guess. I'd estimate probably more like 100k every second, but whatever.

So also imagine that every ten seconds, someone is buying something from a vendor, or repairing their items (Since you don't generally spend as often as you gain, but the values tend to be larger, we'll split the different and call it ten seconds for a modest amount). So lets call this value 1000 every ten seconds, or 100 pax every second is being deleted by the game. Because that's what happens when a vendor takes your money. He's not putting it back in the pool for other players to earn. The game system is just deleting it; just like it creates it for players to earn.

So, with our imaginary numbers, we have 1000 pax being made every second, with 100 of it being delted. for a net gain of 900 pax coming into the economy every second.

24 hours a day, seven days a week, not counting downtime. Some quick math...

544,320,000 Pax going into the economy every week.

ThIs is money that Never goes away, it just trades hands. After a month, you have nearly 2 billion new Pax being generated every month. With roughly only the same number of players to distribute it across."

User blupache:

"The real money comes once you're in the QL10 zones, getting stuff you don't want that's potentially top end in-demand gear on the marketplace."

So basically the stuff they want is "purples" or "pvp IOs" and such. There doesn't seem to be anything like levels in this game, since your "stats" are tied to their Ability Wheel concept and you get various "points" to increase wheel efficiency. So you'll never get Mako's Bites, Numina, Miracle, etc. at Mid-level crisis. It's basically a gear wheel that gets topped up by signets/high-end gear.

Morteia, a Community Manager, hints that there is no trading PAX for their equivalent of Paragon Points:

"I'm also a fan of being able to trade large amounts of Pax for FC points, but I honestly have no idea how that would work or if it can even be done. I'll still put it on the list, though!"

It also should be noted that TSW isn't really "alit-friendly" since you can have multiple "wheel builds" on the same character, from what I understand. It would be like in CoH if you started as a Fire/EM Blaster but you had a Mind/Bubbler spec, a Cold Domination/Sonic Spec, a Street Justice/Fire Armor spec and so on, so there really is no need to roll an alt except to see the other two factions.

Hope this help, don't shoot the messenger as I'm not in game there yet, waiting to see what happens here first but likely migrating in October/November.

I liked WoW's market enough to stay subbed there for several months after I'd stopped playing the game proper. It's very different from Wentworths, but has equally engaging potential for eeebil schemes.