Yeah I'm going to buy it from sky-3ds.org too, since it use PayPal. But I don't know wich brand of micro SD should I buy. On amazon, Kingston SDs are cheaper but they don't seem to work properly with Sky3ds, so I was planning to buy a Samsung or a Sandisk one, what do you think?
Well, I thought about it too ; you can have a look at these discussions, they're all about the best sd cards for Sky3ds (not plus, it's about the blue button version); it appears that as you said, we must avoid Kingston at all costs; Samsung and specially the Sandisk are the right choices, so I think I'll pick a Sandisk Class 10 (Class 10 greatly recommended) 32 GB (which could store about 10 3ds games) ; now, it would be useful to read also the feedback of those who bought the Plus (I don't remember if Foxy4 has talked about it in his review), though I don't think there's difference between the two Sky models in terms of SD compatibility
https://gbatemp.net/threads/sky3ds-users-what-size-and-brand-of-micro-sd-are-you-using.376925/
https://gbatemp.net/threads/sky3ds-best-microsd-card.400904/
https://www.reddit.com/r/3dshacks/comments/33n4g9/whats_the_best_brand_and_class_sd_card_to_use_for/
https://www.reddit.com/r/3dshacks/comments/3d16nr/best_sandisk_microsd_for_sky3ds/
http://3ds-flashcard.com/blog/sky3d...ze-to-choose-and-how-to-use-it-on-diskwrtier/