I think blems that occur during manufacturing that don't negatively affect performance aren't a big deal when you consider these snowboards are handmade. If everyone expected a perfect product given how they're manufactured, it would lower the production yield and increase the price. If the original buyer didn't get a break on the blem, should you? The buck will have to stop somewhere if such a precedent begins, and ultimately, it'd go back to the manufacturer and lead to higher prices.
As for names being printed on the board, that's not terribly uncommon. I believe Donek puts on every board, along with the specs, the name of the person for whom the board was built for.
I'm not taking sides about the whole auction situation, but I believe your expectations may have been a bit high for the type of board you purchased. These aren't off-the-shelf mass produced boards.