I bought 78 2'x4's yesterday, each 8' long. It's for our garden beds. It will require a total of 6 trips to/from Home Depot, but the store's not too far away, and it's better than paying their $79 (!) delivery charge. I don't like to put too much weight in my car trunk, so I only take 13 or so at a time.
I have three more trips to make. 40 more pieces to go.
But I've decided to wait a bit longer this morning... until it's at least above freezing. Currently 28 degrees. Hauling lumber is NOT that much fun, and I deeply suspect it being COLD will not make it any more fun.