I believe the answer is: Book value
The number in the book value is made after considering two things; the price when we acquire the asset and the amount of depreciation or appreciation.
Selling an asset on book value is the bare minimum needed for the sellers to not experiencing a financial loss
Stress, depression, being lazy. There can be many factors. Hope this helps!!
Answer:
I believe the answer is of option 5.
Bob is just a human like us and feels stuff, its probaly due to his environment and pressures/stress but heck who really knows. Bob is Bob. and that is that.