The same here.

I have a theory that when buyers start giving bad ratings that ebay actually start lifting tha ranking of listings in the assumption that a seller will perform even worse under a greater load. And visa-versa.

Just to add to the inconsistancies I find that I will have more sales in one state one day and more in a different. For example just over the last week I have sold more to SA  than the entire year. Only a small sample so it isn;t really representative but it does seem a bit off.

The bulk of my sales are usually to QLD or NSW but it has changed now. I don;t know what goes on in the NT but in 3 years I have only ever had about 10 sales.

Call me crazy if you want, ebay made me like this.