Just don't venture out of the disdad area talking about ebay pins. you will get beat up out there. They get a bit touchy some of them

I too am guilty of getting ebay pins. I can't tell the difference and I am sure most of the ones I traded for have a very good chance of being reproductions too. But my boys absolutely LOVED trading.
I don't venture into much of the DIS at all any more, so it's all good with me!
We've been burned a couple of times with fake pins - BUT - that's what trading is for!!!!! It was kinda funny, even, because one day when we were at Kidani the week before last, DD traded for a pin and not 2 seconds later DW wanted to look at it. She immediately turned it over and inspected it, seeing it was a fake, and convinced DD to trade it back - which the CM did gladly for her. DD then went on and found a different pin from a different CM that she wanted and was even happier.
For DD - it's mostly about the trading. She loves the art of the deal. But every so often she finds one she really wants and hangs on to it.
For DW - it's partly about the trade - mostly about collecting.
For DDs (both) it's all about collecting.
For me - I don't really care. I have a collection, but every so often I go through and eliminate ones and put them on my lanyard to be traded. The only ones that I "really" care about are special commemorative Annual Passholder ones that I know aren't readily available to the masses - especially the
Disneyland AP ones. THOSE are the ones that I collect. The rest - eh, it doesn't really matter.
So we purposely buy on eBay just to trade. There's just something about getting pins for $1-3 each vs. $8-16 each. When trading, I purposely look for those pins that I've then observed in the shops - and then the ones that I've liked, I'll keep. Those that are just so-so, I'll trade to trade again later.