The woman, known only as Angie, told potential buyers about how she and her sons had been burned by her ex in the description of the train set, The Sun reported.
"He has left me and the boys in modest rented accommodation and taken/sold everything," she said.
But she said she is "infinitely richer" now, adding, "Matrimonial prostitution is an expensive activity, for the woman if not the man."
In describing the actual train, Angie said it had been barely used because of her ex's "pathological need for order and tidiness."
The listing has gotten her sympathy and even marriage offers. "Sorry guys, once bitten twice shy," she replied.