CaCook via Amazon offers its CaCaCook Stainless Steel Adjustable Mandoline Slicer in Black for $25.98. Coupon code "AX3IKFUF" cuts that to $14.99. With free shipping, that's tied with last month's mention, $11 off, and the lowest price we could find. It features six stainless steel blades and cuts to a variety of sizes. Deal ends June 30.