Amazon has a  Pack of 4 10-ounce Pilon Espresso 100% Arabica Coffee Bricks for $14 - 25% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $10 with free shipping on $35+ or with Prime. These generally go for around $4 to $5 a brick and they get great reviews.