I don’t post in this thread too often, but I have just been able to buy the Spanish Shiny Seviper, after following @cullers method he posted here a few days ago: 
I had already send messages to sellers of Spanish Hidden Fates booster packs a few months back, but today I also send messages to sellers of at least three different Spanish Shiny Pokémon from the Hidden Fates set asking if they had the Seviper, and one of them did.
Now I only need one more Japanese Seviper and then my collection of 135+ Seviper cards across all languages will be complete (assuming the three still incoming Seviper cards arrive without any issues 
).
I’ve also moved things around in my binders, since I was lacking space at some sections, and discovered a Pikachu error I had and wasn’t aware of (ink drop). So I also bought a non-error version.
And I’ve also purchased the final four Thai Pikachu cards, including the pretty hard to find Pikachu & Zekrom GX Hyper Rare.
Overall a pretty solid day, in terms of purchases and re-organizing.
Greetz,
Quuador