I just found the 1939 Grosset & Dunlap 1st American edition in a thrift store, complete with dust jacket, for $1.
Here is the blurb on the inside flap:
The theme of this - considered by most to be Lawrence's greatest work - concerns the right of a married woman to have a child by another than her husband. Connie (Lady Chatterley) is married to a man deprived by the war of the power of begetting. She begins by having brief affairs with several men. Then she meets Mellors, her husband's gamekeeper, and for the first time in her life falls really in love. Still she clings to the man who is her husband because of his belief that the 'habit of marriage is more vital than any occasional excitement," until one day when she knows that she is going to bear Mellors' child.