I use the post office to send a good number of packages. Everything from quilt block swap blocks to gifts for my grandchildren. I try to avoid international posting of packages because of duty charges. It can't be helped many times. I try to use flat rate envelopes when ever possible. It is amazing what can be stuffed in one. The padded envelopes are good for so many things. For smaller packages it is still less then UPS or FeEx. I am always checking all 3 just in case there are changes that make a big difference on shipping. I have also checked on how much I can get something delivered via Uber and Lyft. Some times this pays or even asking to pay a neighbor if it only has to go across town within 30-40 miles. I just saying there are so many options. I prefer the USPS and the pickup at home is great. and I can print my labels at home and pack and go.