FWIW.....
Sometimes in life, we make mistakes, and IMHO, you suck it up and move on.
No bullshit fantasy stories or intricate lies.
I once listed a rather rare memory board for $1 BIN (it was supposed to be $1 starting bid). Someone snapped it up, and got a great deal, because my mistake, not theirs.
edit: full disclosure, the buyer sent me an extra $50 (still way below value, but hey), because I honored the auction. People respect those who honor their word, not so much for those who make it up.