Good luck, it was something like 9 months of watching JYA before it popped up. (When I had money, but that's beside the point.)
Here are a few PC titles I have that can be considered rare: Jazz Jackrabbit and Tyrian show up periodically, but for rather high prices, but the Korean game, Eojjeonji Joheun Il-i Saenggil Geot Gateun Jeonyeok 1 and 2, I have yet to find again for sale online with my usual searches.
what websites do you use for your korean searches? do you know of any fromjapan/noppin/rinkya similar websites for korean games?
I only did it for this one game back in 2013, and I can not for the life of me remember the site name, but it was an online mall marketplace that had it for sale. I just remember Googling the actual Korean name and getting some results for auctions.
Every prototype/beta is pretty rare but I suppose that the rarest things I own are my Pokemon Blue GB prototype, my Resident Evil Gaiden one and my PAL version of the SNES Life Fitness game (see below).
I got this proto from Steven, one of our members. The version I have is PAL, with some differencies with the retail version, mostly small graphical corrections.
That's a cool rare find. If you ever decide to part with it, hit me up To contribute, here's one of the rarest items in my own collection. A boxed copy of the Korean horror game, Whiteday: A Labyrinth Named School. It's almost complete, just lacks the special disc holder and the poster.