Have been following the price of these for a while. I just saw Harvey Norman run a good special overnight, checked NL in case, and using the method listed here
https://www.cheapies.nz/node/24307 they come down just below the lowest all-time price (today's price listed by Harvey Norman)
If you use the sign-up code (MYNL16W10) you get another $10 off which brings it down to $183.41 & $202.69 respectively + 4 Flybuys.
Can also get the wireless charging version for $229.71. Also at the lowest all-time price.
Great headphones, very well-reviewed. The main difference between the two is an IP55 vs IP57 waterproof rating. This model is known for a comfortable fit and good sound. Jabra has recently updated firmware adding ANC (Active Noise Cancellation) to the product.
I got the 65t two years ago and I use them every day. They're currently discounted to $118 at Harvey Norman, which is about half the original retail price.
A friend bought the 75t and likes them. He said the ANC is middle of the road — worth having, not amazing.