I'll leave Deidara out since he's in the game already. Edit: They're fictional.
ITACHI

Icha Icha Paradise complete set (+0): I'm not interested in reading

Flower Bouquet (+10): They smell nice.

Ninja Hound Puppet (+10): It is pleasantly soft.

Ninja Tool Set (+20): I'll put it to good use. Thanks.

Piggy Bank (+0): My debts can't be repaid with money.

Ramen Coupon (+15): I used to go to Teuchi long ago.

Mystery Ninja Scroll (+30): One can't never learn enough techniques


Snack Gift Pack (+30): You didn't have to, but thanks

Sashimi Platter (+70): Exquisite

KISAME

Icha Icha Paradise Complete Set (+0): Love makes you *

Flower Bouquet (+0): What is exactly the meaning of this?

Ninja Hound Puppet (+0): Dogs are loyal and loyalty is a farce

Ninja Tool Set (+20): The only thing I need to fight is Samehada, but everything adds up

Piggy Bank (+5): I'm not greedy, but one needs money in this world of ours

Ramen Coupon (+15): Konoha's ramen is the best I've tasted

Mystery Ninja Scroll (+30): I'd be a fool if I refused this


Snack Gift Pack (+30): I'm actually quite fond of sweets

Sashimi Platter (+70): How did you know this was my favourite food?


ZETSU

Icha Icha Paradise Complete Set (+15): Is this how humans reproduce? Interesting

Flower Bouquet (+10): A bunch of plant reproductive organs? Why?

Ninja Hound Puppet (+20): A shame it isn't real. Dogs are tasty.

Ninja Tool Set (+0): We are not the fighing kind.

Piggy Bank (+0): Useless.

Ramen Coupon (+0): Our diet doesn't include noodles.

Mystery Ninja Scroll (+30): Pein-sama will be pleased


Snack Gift Pack (+30): We can lure a tasty hum*ing this

Sashimi Platter (+70): Everybody loves Sashimi. Even us.



SASORI

Icha Icha Paradise Complete Set (+5): Literature is not my kind of art.

Flower Bouquet (+0): Things with short lifespan disgust me. Eternity is what matters.

Ninja Hound Puppet (+15): I'm inspired. I could make a dog puppet. With a flamethrower.

Ninja Tool Set (+20): One never has enough supplies when they own more than 300 puppets.

Piggy Bank (+20): Puppet maintenance is expensive in war times.

Ramen Coupon (+0): My improved body doesn't obtain energy through feeding.

Mystery Ninja Scroll (+30): Can't wait to study it.


Snack Gift Pack (+30): I used to eat them as a child.

Sashimi Platter (+70): They look good. I wish I could taste them.



TOBI

Icha Icha Paradise Complete Set (+15): Ohh! These drawings are nice!

Flower Bouquet (+20): YAAAY. I'll give it to Deidara-senpai (after I hide some bees in it).

Ninja Hound Puppet (+5): Tobi is afraid of doges. T_T

Ninja Tool Set (+20): Shiny!

Piggy Bank (+15): Hmm, this doge looks weird.

Ramen Coupon (+20): Senpai will love this.