I fussed at Home Depot for putting severely twisted boards out to sell. A bow is one thing but over 1" twist in the board is unacceptable.
I recently found out if you show a worker a board like that they mark it and you can get it at 75% off, not good if you need a whole board but if its going to be cut smaller or you don't mind the blemishes it's worth it. Recently found that out and got a couple boards for cheap, they were mostly ones that had a rounded edge.