Amazon has the 105 Fl Oz Downy Eco-box Ultra Concentrated Liquid Fabric Conditioner (Free & Gentle, 180 loads) for $13 - 20% off (automatically applied at final checkout; Subscribe & Save required) - 5% off with Subscribe & Save (can cancel anytime) = $10 with free shipping on $25+ or with Prime.

Walmart has it for $1 more (no pickup available).