Yeah, there's a lot of fake bidding going on. So when ebay list "average price" all their real items appear to be cheap.

When I was looking for a Nexus 5, there were a lot of them for sale around $850. No-one bought them, but they made $500 seam cheap.

That's probably what this guy is trying to do.

I'm a wannabe audiophile. And I think a lot of it is a kind of OCD; we want it to be perfect, and if we believe it IS perfect, then we can relax and enjoy it more.
I'm suspicious of 'premium' sound systems enhancing the bass to give an extra depth which makes the speakers sound better on first listen but is actually not an accurate reproduction. One reason why I hate trying to judge speakers straight up. It might sound better now, but is it genuine?

I've heard that CDs are purposely flattened so they don't clip on low to medium speakers so it sounds better on average speakers.
People who work in professional studios tell me that the final mix sounds a lot better before it's turned into CD format but I haven't gotten to confirm this.

Also I listen to the start of Alison Krauss's New Favourite to quickly judge a new sound system on how it holds bass. That song is much harder on speakers than dance music.