I've sold only a single card on ebay in the last 15 years, but that's it, as I'm a trader at heart.
Perhaps the most important point you made was how all of the edges seemingly match each other. Someone overthinking it would say, "Well maybe the card was a little large to begin with, so he cut all four sides," but that may be a leap too far. If the cards don't jump out at you as being trimmed, look fine next to their counterparts, and you got them at a great price, I think I know whether or not you're going to keep them.
