So I bought an item on 30th of may with a 10% coupon they had active. They were going for around $530~. Today the prices of all these items including mine got dropped to $372~. WTH!! That's just straight up scam. So I paid around $80 more for a sale item with a discount coupon, which is now cheaper than the sale + coupon combined. All this in 1 week!! Its not like the world is burning.
Anyway I reported ebay to ACCC.
ACCC can do hardly anything because the retailer will claim that "it's on sale" now.