Join mythic BOE trash farming runs. Right now the corruptions are readily available so getting a good one no longer gives you a million gold jackpot, but those 475 ilvl items are still worth a ton of money.
I sold a 460 belt with 12% crit corruption for 330k recently. Typical mythic BOE (no corruption or shit corruption) goes for 100-250k on my realm.
Echoes of Nyalotha are still a bitch to farm and on long rotation, so getting a good corruption is still going to up the value by a considerable amount. Just not a silly amount anymore like it used to do before.