Why do eBay sellers do this?

[Monty]

If you live in a small town like I do, you use eBay to get things that aren't otherwise immediately available to you. That said, I've noticed a weird change in sellers' behavior in the last year or so that I'm not thrilled about:  Why do they create a shipping label but hold on to the product for another two or three days? 

On my most recent purchase, I was notified that the seller was "packing  your item for shipment!" as soon as payment went through, yet three days later it's still sitting there.  Am I mistaken in thinking USPS will pick up a package once it's got a shipping label?

Just asking 'cuz I've shared my multiple issues with USPS delivery, and now the sellers are adding to my consternation.

[Ace-Garageguy]

They do it because they can.

Some sellers are really great about shipping the same day they get payment.

Some take their sweet time, often not getting the item to their local PO for several days.

Not much you can do as far as I'm aware.

I've had to become pretty patient over the years, and have seriously cut back buying anything online because a lot more people seem to be jerks now.

It's just the brandy new oh-so-mo-better world of muh technology we live in today.