What can you trade now in diablo 4 ?

What is allowed on here for selling ?
Whats tradeable? I have played since season 1 really dont know whats worth selling etc. Are all legendaries and shit tradeable ? worth trading ? yellows? What about the ones above legendary?

Gold the goof stuff

Yellows? Dude you are behind quite a bit....

You can trade everything except for mythical items. Really worthwhile items to trade are gold, greater affix legendaries or legendaries with max rolls, uniques and now runes. Perfect rubies were a thing a season ago but not much anymore.