If You’re Told No, Say Thanks And Try Someone Else
The industry of selling second-hand electronic equipment is highly lucrative. Because we all rely so heavily on our electronic gadgets and cell phones in this day and age, it is essential to have a computer that is maintained up to date with the latest software and hardware. In order to acquire one, there are those who will resort to less conventional means.
It sounds like this person was trying to get the seller to sell at less than half the asking amount, which is plain unacceptable. You should not be afraid to inquire about it, but if you are informed that it is not possible, you should express gratitude and move on to the next person.