Amazon has the 3-Pack Philips Norelco OneBlade Replacement Blade (QP230/80) for $31 - 20% off coupon (clip green coupon) - 5% off with Subscribe & Save (can cancel at any time) = $22 with free shipping on $25+ or with Prime. Fits on all OneBlade, OneBlade Face + Body, and OneBlade Pro handles.

The 2-Pack is $16 after coupon and S&S discount.