I’ve compiled a list of the conversations between NPC’s that are relevant to Bazaar of the Four Winds storyline. If I have missed anything, please let me know. Also, you can find my Secret of Southsun NPC Conversations here: https://forum-en.gw2archive.eu/forum/archive/southsun/Possible-Spoilers-NPC-Conversations. Consider everything below as a spoiler.
Human Merchant: Looking for something to add a little oomph in your step?
Human Merchant: That’s your final offer? All right. It’s a deal. 
Human Merchant: I only have one left. Some snot-nosed skritt ran off with the other one yesterday. I never got it back.
Human Merchant: Keep touching the goods, boy, and I’ll make you marry ‘em on the end of my dagger.
Human Merchant: Oy, you gonna buy that or just look it to death?
Charr Merchant: We made it in time. Maybe this year we’ll make enough to buy a cow.
Charr Merchant: Do not take your eyes off the merchandise, son. Not for a second. There are thieves everywhere.
Charr Merchant: There’s dark magic here. I sense it in my bones.
Unusual Merchant: Oh, hey there! Would you mind, um… putting that down, please?
Unusual Merchant: Oh, no. Woe is me. Look, messing around with unknown forces has unleashed deadly consequences. Because this has never happened before.
Unusual Merchant: (sigh) Why doesn’t anyone ever listen to me?
Unusual Merchant: My hero. Say, you wouldn’t want to buy that, would you?
Note: The following merchant dialogue are said by multiple unnamed characters throughout the Bazaar.
Merchant: Powdered beet root and other hard-to-find ingredients!
Merchant: Sold! You won’t regret it.
Merchant: Accepting all land-based trade!
Merchant: Best prices in all of Tyria. Special bazaar discounts.
Merchant: Roasted Meats! Cheese! Ale!
Merchant: Fresh from the Gendarren Fields!
Merchant: Don’t miss the best deal on the block!
Merchant: Finest craftsmanship here.
Merchant: My selection is unparalleled.
Merchant: take home a souvenir toothpick!
Merchant: Cinnamon, cardamom, and curry!
Merchant: Bangles for your sweetheart!
Merchant: What’s that you say? Ah. I don’t sell that kind of thing. Try someone else.
Merchant: This little beauty is worth more, but I need to sell it quick.
Asuran Stranger: I’m half afraid to try any of the food here and half thrilled to try something exotic. 
Asuran Stranger: Keep one hand on your purse. I just saw someone get pickpocketed.
Hylek Stranger: (laugh) Did you see that? Never in my life have I seen such a thing!
Hylek Stranger: My kind of magic doesn’t use those kinds of foci. I’m a little sickened.
Norn Stranger: I’m surprised all of Lion’s Arch isn’t here. 
Norn Stranger: Do you think we could visit the Zypher Sanctum?
Human Stranger: Some of these people are scary. Do you think they’re pirates?
Human Stranger: I hope my mother likes the powdered harpy wig I bought her.
Human Stranger: I simply had to buy it. It was so odd!
Human Stranger: C’mon can’t you try a bit harder? That look on your face is scaring folks away. 
Human Stranger: Look alive. Here comes a sucker.
Human Stranger: Welcome to the bizarre bazaar! Shop, haggle and browse your way to a better you!
Human Stranger: Where’d you put my revolver? Oh, I see it. Good. Just in case. 
Human Stranger: We’ve already paid for the trip. The rest is ours to keep.
Brat: I want one, Mom. I want it.
Human Stranger: Ok, Ok, sweetie. I’ll get you just one, Ok? Just this once.
Brat: I want two. Mom, I want two!
Human Stranger: Fine. Two. Just this once you can have two, Ok?
Urchin: Better get back. Pappy’s gonna be steaming at the snout.
Urchin: Watch out! I may be small but the parts I can reach are… ooh. Running now!
Urchin: Three booths down from the one-legged man. Three booths down form… oh spit. 
Urchin: Oh yes, my lady. Oh no, my lady. Pfff! Witch.
Urchin: Get out of my way. ExCUSE me, you great oaf!
Urchin: (laugh)
 But awesome work nonetheless! Thanks for doing this.
 But awesome work nonetheless! Thanks for doing this. But at least you still have Rox, my boy!
 But at least you still have Rox, my boy!