All skins will retail at 750 RP, check out the video gameplay spotlights below for ingame footage of them, note Zed is the only one that has currently not been released to the PBE and is expected tomorrow!
SKT T1 Lee Sin!
SKT T1 Zyra
SKT T1 Jax
SKT T1 Vayne
There's also a special SKT T1 Ward Skin!