I've found that FedEx and UPS can't compete price wise with USPS under 4 lbs which covers most of what I sell (used to sell). UPS charges 16.00 per week for the privilege of driving by and picking up your package at a 25% lower rate. Pay residential rates and you can drop it off yourself or pay a fee to have them pick it up. How far do you have to drive to drop off a UPS package? It's 22 miles here round trip.
All the Priority Mail supplies are free and they will ship them to you for nothing in great boxes you can use in the future. They offer tubes 24" to 36" long for those oddball items like the tools we sell. I've gotten a lot of positive feedback on packaging. It's sturdy, clean and impressive. They will pick it up at my doorstep for nothing. With the price of gas the way it is, that's a savings. I can offer my customers a better rate through USPS and that also keeps them coming back. That's my bottom line.
Good luck to all,