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Rockbottomgolf has the Mizuno ST190 Driver on sale for $ 170.09 before tax. Use code YEBJR8ZS64 to take off an extra $ 18.90. Shipping is free.
It was voted as one of the best drivers in 2019 by golf digest. https://www.golfdigest.
They have regular and stiff shaft options.
From my research that is it the cheapest it has been.