FedEx Ground (formerly RPS) is a big ripoff. Their shipping is competitive with UPS, but they will try to charge you a $10.00 weekly fee for pick-up. Each time I've used them they've done this, even though I didn't request a weekly pick-up schedule. The cost for shipping + the fee adds up to more than it would cost for FedEx 2nd Day service. Additionally, if it's a COD, I've waited 3 - 4 weeks for the check to be delivered to me. It would have been faster for the buyer to send me the check in the mail! I've used FedEx 2nd Day service and have never had a problem and the COD checks arrive usually 2 - 3 days after delivery.
