I'd rather buy from the exchange here, but sometimes the exchange does not have what I want. So, I look on ebay. I've been doing business on ebay - both buying and selling - for a longer than I can recall. During that time, and tons of items bought and sold, I have had one bad experience and I got that one resolved. But ebay isn't for everyone. You have to be careful about what you buy and who you buy it from. For example, I recently bought 3 different Case Peanuts in a 24 hour period from ebay all of which were exactly as described and delivered promptly. None available here and a gifted 'nut from a great forum member prompted me to want to get a few more. No issues, all went well. But I bought from solid dealers that had too much too lose to try to shaft a buyer.
And Paypal is a lifesaver. Love using them. No offense, Richard (you seem like a nice, solid guy), but I wouldn't buy from someone who required a MO. Way too much trouble for me to drive the 15 miles one-way to the nearest place that I can buy a MO. But Paypal? Quick, easy and safe to use (if you use it properly).
As RevDevil said, "Someone once told me when a person has a bad experience they are likely to tell everyone they know, when that same person has a good experience they only tell a couple people". That is exactly true. Just from the sheer volume of stuff that goes through ebay, I'm sure that some have had bad dealings and post about it. Those of us who have had good experiences tend not to mention it.
So, just my opinion. We all have one.