Most valuable "ítem" in the game ?

revives=lucky eggs=potions..

No way I'd want to trade star dust I live in the city and catch a shitload of Pokemon but it's never enough star dust to power up all the Pokemon I want to I'm level 31 I'd rather trade candies I have so many pinser candies and nothing to do with them

I'd even rather trade potions or pokeballs before stardust

Revives are becoming increasingly rare. I'm guessing they will start selling packs of healing stuff.

For me revives are really common. I always get some at pokestops.

I'll trade all my potions, max potions, revives, max revives for whatever amount of stardust you have to offer. I'll go downtown or go to the local park that has 13 pokestops to stock on whatever, rather than catch 50 pokes for 5000 stardust. Stardust by far for me!

For me it's stardust. When I go to the park near us to refill my items, I always end up getting too many revives and throwing some away. Stardust storage is unlimited,so you never have to throw any away. I've also been lucky enough so far to always have pokemon that I want to use my stardust on.

All candy is not exactly equal. Currently I am most in need of different kind of (rare and uncommon) candies and flooded with great balls, because after 3rd party maps went down, I have not found anything to throw them at. Would like to be able to trade them to revives and potions.