Spring has arrived. I know because Costco has been selling soil, compost tumblers, tomato plants and other gardening supplies lately. I’ve been thinking about the Lifetime Dual Composter Model #60072, which Costco sells for $149.99. Amazon sells the Lifetime 60072 Dual Compost Tumbler for $230.49. I guess the 81 pounds in shipping weight skews the economics of purchasing from Amazon.