If it looks like someone just wants it disenchanted so that they don't have to get it from players or the mob again, then it will be expensive enough so that buying it from other players would have been way cheaper.
Enchanting an item is a commitment, it makes the item you enchant special.
Here's another perspective: I have more commitment towards keeping the Celeah enchantment as long as I can because of it's uniqueness, and rarity, than to any piece of equipment in the game, because that's what makes it special to me. XD