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Samsung is planning a 400-500$ foldable for 2024
(mashable.com)
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The current foldable prices seem very artificial. We know how much screen panels cost and it definitely doesn't double the cost of production. Its kinda weird to think that all these foldables conspired around same price point but it's not impossible that they are just following one another.
I would guess that this cheaper model won't have any outer display and maybe the inner display might be LCD instead of OLED. And of course the CPU will be Snapdragon 7 series, which is fine
Apart from that I don't see where else they could save costs.
I agree that the prices are inflated just because it's something new and novel.