Or, like in DA:Tillie-TMB’s ‘AoS’ (‘Amulet of Shades’) comic series, actual horns are illegal while horn dust is perfectly legal, so these horns might just be plastic replicas, they’re being sold in some supermarket after all, not at a surgery or something where you can go to get a prosthetic functional horn in the place of a lost one.
Or, like in DA:Tillie-TMB’s ‘AoS’ (‘Amulet of Shades’) comic series, actual horns are illegal while horn dust is perfectly legal, so these horns might just be plastic replicas, they’re being sold in some supermarket after all, not at a surgery or something where you can go to get a prosthetic functional horn in the place of a lost one.