What's the point? Why should people give you their cards to build something, I don't have any myself, but I didn't know people are willing to give their cards away to something useless. If you want to get it done, do it yourself. I know, how are you supposed to buy so many cards, but you don't go taking other people's cards to make it.
Then again, who uses pokemon cards anymore? This may be the best thing done with them.
