USPS parcel post shipping "tracking" isn't like UPS or Fedex tracking. It does not show ONROUTE info. So honesly it's pointless to go to the USPS site and look it up, it only CONFIRMS DELIVERY. Please allow 10 days maximum for delivery.
Sellers have the right to set their own prices independently, but some manufacturers place restrictions on how these prices will be displayed or communicated to others.