It's really hard finding the OG Demon's souls here, but after 3 years of searching, I was finally able to secure it merely a week after finishing the remake! : r/demonssouls
Demon's Souls - Exclusive PS5 Games | PlayStation (US)
Buy Demon's Souls - PS5 Game
Demon's Souls - Exclusive PS5 Games | PlayStation (US)
Demon's Souls (PS3 / PlayStation 3) Brand New / Region Free 730865001323 | eBay
Demon's Souls - Exclusive PS5 Games | PlayStation (US)
Demon's Souls
Here's The Demon Soul's Remake Being Compared To The PS3 Version
Buy Demon's Souls Remake - PS5 Digital Code | Playstation Network
Demons Souls - Sony PlayStation 3 for sale online | eBay
Buy Demon's Souls - PS5 Game
Demon's Souls PS3 — buy online and track price history — PS Deals USA
Demon's Souls
Demon's Souls PlayStation 3 PS3 Game Case Game Cover Art | eBay