No, no—I an’t going. Let Eliza go—it’s her right! I wouldn’t be the one to say no—‘tan’t in natur for her to stay; but you heard what she said! If I must be sold, or all the people on the place, and everything go to rack, why, let me be sold.
This is a really important narrative moment. It not only portrays Tom's devotion to his owner, but is resistance to leave the life that is in the now to the life that isn't guaranteed. In a more broad sense it portrays slavery and the harshness of it. It's the only life he's ever sadly known.