Anyway , initially he said he can give us a $ 50 cash return if we trade in our own vacuum cleaner . When I asked if that 's the lowest price he could give us , initially he said yes and when I asked again later , he said if we took the demo model , he could give us $ 100 off . He added that he could n't be bothered to pack and unpack the machines so he said he would just write " demo " in the receipt but in actual fact , we would have a brand new one .

Question: Why is the person offering a $ 100 discount ?
Answer: Because he really wants to get rid of the demo model .He 's trying to give the buyers incentive so that a sale can be made .None of the above choices .Because he does n't want to pack and unpack machines .