I think what is really irritating is these threads that come it seems every few weeks about someone complaining about eBay Amiga auction prices.
If you don't like the price, don't bid. If you don't like eBay, stop visiting there and then complaining about it here.
It is a huge waste of bandwidth and hot air. It is, what it is, for better or worse. If you know what you are doing, it is a useful place to increase your Amiga collection, probably the best resource for "Rare" Amiga items that you probably couldn't find elsewhere.
The only time I get worked up about eBay auctions is when the seller is a crook and is selling something that is not his/hers to sell (pirated software)
My advice, get over it and get on with your life. It is short and too precious to be wasted on such trivial annoyances.