USPS has a few different types of tracking numbers. One is $00.65 and all it will tell you is when it was delivered, the second is an actual tracking number like UPS (it will tell you were it is at all all time), it is around $1.50 and I'm not sure what the other is. USPS is much cheaper than FedEx, UPS or DHL if you don't get the tracking number option or insurance. I always get the $00.65 tracking number and pay for it myself. Just in case the buyer says they did not recieve the item, I have proof that they did.USPS doesn't give you a tracking # unless you ask for it. And I believe it costs extra.
And, on top of that, the shit never works right anyways. Whenever I got a usps package it would always say "shipping info received", up until it got delivered.
