In the mid-season sale catalogue, Transformers are shown to be 20% off, and they include some examples... like the new Cyberverse Ultimate figures for $48 (from $60).
There is actually no official end date to the sale (nothing noted in the catalogue, and even the staff had no idea of when it ends), so it could be a month or just a couple of weeks... but at least it is more than just a weekend discount like it is usually.

(Wave 3 POTP Terrorcons have now been found at Myer too, making them $28 each during this discount period.)

Speaking of weekend discounts.... there is another one for all other toys this weekend (Saturday & Sunday only), with some exclusions.

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