YesAsia.com sale question

hi everyone! yesasia.com has a pretty decent sale going on with k-drama and blu-rays, the question is if anyone can tell me if there is anything really good on sale? i know nothing about the tv dramas so any thoughts would be appreciated. M looks interesting and a little weird ( i like weird usually). some of the blu's have nice prices but nothing jumps out at me so please offer recommendations if you have them! here is the link: http://www.yesasia.com/us/en/home.html

on another note, i don't own oldboy but want to get it....what version does anyone recommend? 3 disc, blu-ray, single disc, other regions, etc. any comparisons or picture quality references would be appreciated.

thanks for the time and take care!