Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
I've been asking people for Females in special balls and with Hidden Abilities (if you have a fossil Pokémon like this, that would be gold). But you may deposit whatever you think is fair :)
Sadly no fossils :( On hand right now, I could do sport ball pinsir, nest ball shroomish/dratini, love ball mawile, lure ball magikarp, sport ball pinsir. Let me know which is most appealing and I'll put it on GTS :)
Either GTS or direct trade work - whichever is better for you.