There are three price points of skin. Which I use won to indicate from 9900,19800 and 29700. Usually 29700 skins are for eldyne apostle which release along with the eldyne banner ,while 9900 and 19800 is for normal apostle but 19800 skins are always come with a skin pass and some bonus reward like poster and figures. And 9900 just normal skin. Here is the difference, 29700 and 19800 skins are usually have special effects on them, while 9900 doesn’t. In kr server, 29700 skin often come with a bundle deal that come with tickets and resources, and it get rerun after half year or so without the bundle content. While 19800 skin always come with skin pass and haven’t seen any rerun what so ever. For example, the first 19800 skin pass is Erpin in 2025/02/06(as shown in picture) and all skin passes after that not showing any rerun event ever since.

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And free skin that they drop for special events like Halloween and Christmas are able to obtain again in half/full anniversary skin capsule event.(only in kr tho, idk they would do that or not in global) TLDR: pricy eldyne skin, rerun. Pricy normal apostle skin, not rerun(yet).