Same deal as I posted (and bought) earlier in the month from Trade Tools (QLD Only) for $1599, but now $1499 at Total Tools and Sydney Tools nation wide.
Spend $1 extra on an eligable EGO product (e.g. spare blades) to qualify for the 5Ah battery redemption (as opposed to the 2.5Ah). I'm not sure what the eligable or qualifying products are though, but going by Sydney Tools, it's anything on this page: https://sydneytools.com.au/category/ego-redemption?orderBy=price_asc&p=1
EGO have confirmed via email that a purchase of $1499 can qualify for the 5Ah as they make allowances where the price is so close. They will approve a $1 discrepancy. Their instruction is to make a claim for the 5Ah when filling out the redemption form.
https://www.totaltools.com.au/186596-ego-56v-brushless-2x10a…
https://sydneytools.com.au/product/ego-lm2136esp2-56v-100ah-…
I am looking out for a Makita 40V Deal Mower + Multihear Trimmer + Chain Saw + Blower + 2 Batteries and Charger = $1500