Was just doing my usual search for the more recent Studio Series Constructicons when I stumbled on this offer. There is a $10 off code (APPONLY10) on selected Transformers figures sold by Amazon AU but you have to use the mobile app to get the discount.

https://www.amazon.com.au/s?k=transf...ef=sr_nr_p_6_8

The earlier wave Studio Series Constructicons are among those eligible for the discount.