I appreciate the frustration, however there is something that is VERY importanbt to remember.

There are 2 parts of te delivery time estimation that is in teh eBay Listing.

a) Postage Time.

b) Handling Time

Ebay states an "estimated delivery time" based on the total days of both of these.

The timeframe a) is entered into the listing by the seller - if they state a 3-day handling time, then the minimum that eBay will quote is "4 days".

A LOT of smaller sellers only post a couple of times per week - you need to be very mindful of what the have actually quoted. Assumption that Express Post will arrive next day is a very common mistake made by buyers.