Implicit Changes - Wands ETC (Mirrored Items)

In the patch of 2.3 there's a note saying

'We are buffing the implicit mods on Wands and Sceptres. In addition, Daggers, Wand and Sceptres will be slightly more likely to roll caster or attack prefixes if they already have related mods.'

Right now you should probably not buy Mirrored Daggers, Wands and Sceptres due to this change as they could be improved after the change making you waste your money.