So, simple idea but a bit of a strange one, why not have bazaars at our own homes? They would work just like the normal bazaars, but we put our own stuff in there, like a bank, and our friends can buy and trade their stuff for reduced prices. Or maybe you would just have a new bundle house with it's own bazaar? Although I suppose you could just call it a trading post. Anyways, just a fun little idea.
It's a great idea! I once had the same idea. But the main problem with that idea (and the reason I didn't suggest it myself) is that getting random people to enter your house is not that easy. I think an improvment to this idea is a new type of bazaar - Only accessable through a unique housing item, you can go in and buy/sell items to other people directly without selling it with a fixed price. e.g: I have 100 Sunstones I want to sell. I could go in and put them up for sale for lets say 1500 gold per Sunstone. now another wizard who is looking for Sunstones to buy will go in the the reagents section and will see my offer alongside other offers from other players:
Sunstone: 26 X 1250 100 X 1500 14 X 5300
If he needs 50 of them he will probably buy 26 from the cheapest offer and 24 from me.