Short Answer? Not from us, and for good reason. Your other seats won't match. Our seats are professionally cleaned to like-new condition. Even if you get your other seat cleaned, it may not match perfectly.
Whether your seats are leather, cloth, or vinyl you should replace your seats all at once. All materials fade, wear, and discolor with age. When you purchase a seat, the seat is probably going to be a slightly different color than the seat you have in right now. By replacing either a whole row of seating, or the entire set of seats at once, you eliminate the risk for having seats that don't look like they are the same color.
All of our seats will be more true to the original color than any used seats as ours are all professionally cleaned, detailed, and conditioned as necessary. Just check out the before & after pic below: