Can you buy delisted games on Steam?

Excuse me, I was wondering if you could possibly shed some light on a question I've been having. I've been a avid gamer for quite some time now, and I've noticed that some of my favorite games have been delisted from Steam. My question is, is it still possible to purchase these delisted games on Steam, or have they been permanently removed from the platform? I'm hoping there might be a workaround or a way to still access these games, as they hold a special place in my heart. Thank you for your time and consideration.