Amazon has the 2-Pack Voltaren Arthritis Pain Gel (3.53oz Tubes; Diclofenac Sodium) on sale for $27 - 25% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $19 with free shipping on $35+ or with Prime. Roughly $9.31 per tube vs. $18 at Walmart.