I went to the local lumber yard. Asked the guy if he had 2x4, 4x4, and 6x6. He told me,'We don't sell lumber here. Good Bye.' Now isn't that astonishing?!! I have bougth lumber there since the '70's'.

I went to Lowe's. Their 2x4 are full of knots and cost $1.50 each. The poplar is $3.79 each.

Too much for me. I went out and split a maple log and bandsawed my own lumber. I was just using it for carving so I did not need it 'dimensioned' thru a planer. A lot cheaper than buying wood if you have access to some nice firewood. By splitting the log into squares the grain is mostly straight, not like the bought wood that is cut to size and has knots and crooked grain in it.
