Not a bargain but can't be.
I'm a big fan of the Bosch Aerotwin wiper blades
Not really a deal or a hack, but rather than buy individual lengths, e.g. 500+550mm, buy them as a set.
For my car, buying them individually will cost approx $55. I bought them as a set for $38 on sale.
Even at the same price, why would you pay $69 for Wipertech? Wipertech have great reviews online, but poor feedback from the people I know who have bought them.
I've been superhappy with Bosch Aerotwin wiper blades. Lasts a lot longer than the geniune wipers which can be over $100 at the dealer. My old car has 3 year+ old Bosch Aerotwins, the car has never been garaged and I expect one more winter out of them.
FYI, I buy a lot of my parts from Runautoparts. been using them for years. Good quality parts and good prices.
Check your car's (Bosch) parts here: https://online.autoinfo.com.au/oscar/boschautomotiveaftermar…
bosch wipers are good
wipertech very obviously is just a dropshipper