Here is a great phrase to help you when negotiating until you get the price you want.
" Drive a hard bargain "
Example 1
A. $ 4000.
B. Too expensive.
A. $ 3500.
B. Still too expensive.
A. You drive a hard bargain. Okay, okay, $ 3000.
Example 2
A. It's more than I wanted to pay, but you drive a hard bargain .
B. That's why I'm rich.
https://dictionary.cambridge.org/us/dictionary/english/drive-a-hard-bargain