Where do you buy Blackberry at a good price?

I often see posts where people buy the phones of my dreams at too low a price. Please share links, if possible (EU, USA, China, it doesn't matter, I would order delivery via Nova Poshta), where I can find phones in good condition at a great price, since I am a student, the main thing for me is that telegram works fine, and that it is a dumbphone like. KEY2 looks good for me) Thanks 🙏🏻