This is definitely YMMV.

Clip Mperks offer for 40% off clearance golf balls (except Titleist).
Mperks also has a reward for $ 15 off next shopping trip for every $ 100 you purchase in sporting good items.

Deal ends 12/26.

I found some Taylormade Tour Response 12-pack balls that were clearanced to $ 34.99.
Plus 40% off – $ 20.99 + tax.
I was able to buy 5 cases. With the $ 15 off next purchase. It will essentially bring the price down to $ 17.99 + tax.

These still end up being a few bucks more than lightly used/imperfection Tour Response balls. But if you prefer to buy new, I haven’t seen a better deal.