How to get discontinued IKEA items?

Hello there, I'm curious about something regarding IKEA and their discontinued items. I've been eyeing a specific piece of furniture that's no longer available on their website or in stores. Is there any way to still get hold of these discontinued IKEA items? Are there any third-party sellers or platforms where I can find them? I'd really appreciate any tips or advice you can give me on how to go about getting my hands on these elusive IKEA treasures. Thank you!