Current top priorities:
Dragonlord Atarka
Sarkhan the Dragonspeaker
Sarkhan Unbroken
Shaman of Forgotten Ways
Surrak Dragonclaw

Cards in my inventory may be traded, depends on what you want and what you're offering.

I don't do this for profit, I do it to turn cards I don't expect to use into ones that I do.  That said, if you only trade for profit, unloading lots of low value cards for one high value, I'm not going to fall for it.

I also have the following oversize cards, if anyone's interested:
Avacyn, Angel of Hope
Griselbrand
Kaalia of the Vast
Oros, the Avenger
Tariel, Reckoner of Souls

I mostly play standard and commander.  I'm always looking to upgrade my red/white cards, and I'm currently working on red/green/blue for the Tarkir block.

I ship cards via USPS in sleeves taped to a rigid back, typically the back cover of a spiral notebook, inside a bubble envelope.  If you're looking for a decently high value card, I prefer to either get comparably valued cards (not just total value) or if you're offering lower value cards in bulk then I expect a little extra value.  I offer the same when going the other way.