OMG and OMGGGGG!
For sure those guys made a good deal but I am not sure if I can make the same.
I can more imagine to tell the lady the truth and offer her my help to sell those BTC for a some percent of the income like lets say a broker fee or I dont know.
Or other option to offer her my help to sell the BTC for the mining machine. Since she cant use it anymore and of course even like what u mentioned if she sell it she will get just a small amount for that.