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Why not just sell a Wardrobe tab where you can put items into it and then it adds those item appearances in your wardrobe?
Like selling one item-copy thing at a time is kind of dumb on your end as well as the player's end; it's inconvenient for the player, so few people are going to buy it, and you're missing out on sales of something people would actually buy, for a larger value.
If you just sold a $10 wardrobe tab or something, you'd sell way more and make way more money, and the people who are interested in that kind of thing, who are a minority of your player-base, will actually be happier about their purchase.
They have these NPC dummies you can buy in Poe 1 that you can attach entire armor sets to, clicking on them equips the MTX....