Final answer:
The marginal benefit of Pookie selling the machine "as is" now is $1,000.
Step-by-step explanation:
To determine the marginal benefit if Pookie sells the machine "as is" now, we need to compare the amount he will receive by selling it immediately ($1,000) to the amount he expects to receive after finishing the restoration ($2,000).
By selling it now, Pookie will receive $1,000, whereas if he completes the restoration, he expects to receive $2,000.
Therefore, selling the machine "as is" now would result in a marginal benefit of $1,000.