This has never made any sense. Unless your grails are unwearable due to age (or being a player's game-worn shoe), why would you get them and never wear them? If it's a sneaker you've always wanted, doesn't it follow that you've always wanted to WEAR them? Otherwise you're about two steps away from keeping them hidden from the light and referring to them as your precious. Don't be a Gollum.
Keep their grails deadstock.