IKEA has black and white mobile phone Wireless Charger on sale for $7.
It's only the charging pad and you need a power brick and USB-C cable as well. But if you want to update your charging cable to wireless by pluging it in instead of your phone each time like me - then $7.
Link to white unit:
Sorry, forgot the power details: 5v 2A (10W I believe)
From product description:
Max. power induction charging: 5W.
Update 27 Hab 9:45am: Now out of stock all locations except Tempe, NSW