In general yes, the average PC gamer (with a decent machine) is more knowledgeable than the average console gamer (not saying the aren't geniuses on console and idiots on PC, just saying on average).
However, the average ebay user isn't that smart, I managed to sell my GTX780 the day the GTX970 launched, and make enough to buy one of my GTC970's outright.
You sure you're not the dumb one? You sold awesome 780 for a 970 lol