Sforno on Genesis 23:13/ספורנו על בראשית כ״ג:י״ג

1אך אם ...נתתי בסף השדה, I will comply with what you said, namely to bury my dead there only if I can hand over the money for the field. I will not bury Sarah there as a result of any other kind of arrangement.

2אך אם אתה לו שמעני, “if only you would be good enough to listen to me! Please accept the money from me so that I can proceed with the burial.”