I just discovered that it is no longer possible to get the shipping cost for USPS standard post (used to be parcel post) from their online website. I dug a little deeper and found out that it's still available, but only at the Post Office, we cannot print the postage online anymore, and their website doesn't include it in their Calculate a Price options.
I checked some of my Ebid listings and they all say that Standard Post is not available. I can understand this, the calculated shipping cost won't work if USPS no longer gives out the rates. And since the cost is based on distance, I can't change it to any set price.
On the other hand, I found that Priority Mail has several new options, and the lower-cost ones seem to be about the same as the Standard Post ones were.
The bad news is that I now have to go through all my listings and change the shipping option.
The good news is that I now get to use the free Priority Mail boxes for shipping.