Because Corel used to sell perpetual licenses, you can sometimes find legitimate, unopened retail boxes of CorelDRAW X5 on eBay or second-hand stores.
The latest version is superior in every technical way. It supports modern file formats (AI, PDF 2.0, DWG), has non-destructive effects, and runs on Windows 11. A subscription starts at roughly $20/month.
To understand why people search for the "index of corel draw x5 exclusive," you must first understand why X5 remains relevant years after its end-of-life.