Selling Combinations?

I only just learned today that vendoring a certain combination of items can give predetermined Orbs as a reward. I've sold a couple of similarly named Rares for Orbs of Alchemy, and sold Normal/Magic/Rare sets for Orbs of Augmentation.

Aside from those two combinations, what're some of the more common things to look out for and save that're useful? It's hard to tell looking at the stickied post on the forum, I was hoping for some input from more veteran players who have been playing for awhile. Thanks!

The only items I bother to look out for are items that have three linked sockets, one of each colour. You don't have to collect and store them like some of the other recipes, so it's good for a lazy player like me :)

Everything known on trading recipes is to be found here:

http://www.pathofexile.com/forum/view-thread/15223

=^[.]^=

Or Here