I know GT is having a 50% off sale on pretty much all Srixon golf balls. Most are sold out online though so would have to check store stock.

As of today I came across the Srixon ZStar and and ZStar XV on sale at Sportchek for a little more than 50% at $23.99/dozen.
https://www.sportchek.ca/product/332...4573=332274574
https://www.sportchek.ca/categories/...4611=332574612

There is also a promotional code: "paypal" (and pay by Paypal) to get $25 off purchases of $125 or more. You can also buy through Ebates for 4% cash back. So if you order 6 dozen it comes out to around $21.50/dozen all-in (after taxes). Hard to beat that!

Good time to either stock up or go in with someone....