Feel like I've been using ebay since it started. Yeah, used to be a great place to find stuff, then it became a small business site. Now who knows what it is. Scams are everywhere, so many people are trying to get something for nothing, or they think their old beat up, dirty item is pure gold. Love seeing 20 yo stuff that looks like it was pulled from your crawl space, asking 120% of retail, as in perfect shape.
Of course that stuff is everywhere. Even here. What to do? Sell on FBM, Craigslist, USM. No overhead, but you got to deal with more crap. I hate to ship anything expensive, or heavy, amps/speakers will not buy outside my pickup area.
That being said, just picked up another sub array on eBay, it should be here next week. The price was too good to pass up, plus shipping was very fair. Asked to have it double boxed, and insured. Also about a month ago, picked up a new rear shock for my MTB, it was the only place that had one available, that was a smooth transaction, happy to be back on my bike.
In short, everyplace has it's issues, plus sometimes you to compromise to get what you want, anything used is a gable.