WTB/WTT: PSP Games

Hi, I am looking for the following PSP games. Must be complete and in good condition. No GH hits plz...

Resistance: Retribution
God of War: Chains of Olympus
Killzone: Liberation
Syphon Filter: Dark Mirror
Syphon Filter: Logan's Shadow
Metal Gear Solid: Portable Ops

Would consider buying, but prefer to trade. I have the following things for trade:

PSP
Gradius Collection (jpn, original release)
Salamander Collection (jpn, original release)
Twinbee Collection (jpn, original release)
Parodius Collection (jpn, original release)

PS2
Thunderforce VI (jpn)
R-type Final (jpn)

LMK if you have any questions
Thanks!