Check prices after you buy.
Retailers often will refund the difference if a splurge item you bought goes on sale shortly after your purchase.
In the USA, sure retailers are willing and often will pleasantly do this. Australia and New Zealand Mmmmm not so much. They are not known for their happy faces when you return goods or a comparison price or even faulty goods.
In my opinion that is stupid actually because good service will always bring you back. I am sure you agree.