I know this is not the correct place to put this thread mods, but I ask if I can keep it here for just a few days. I need to come up with money fast, my brother is having some debts called in and I need to sell these cards fast.
That is a great deal, and hopefully someone will pick it up fast. Two in SLI is nearly the best graphics card option possible. $450 is a savings of over $250. You deserve to have this post on the graphics forum.
It helps to have someone reply to your post to keep the thread bumped up towards the top. I'm sure you will have a buyer within days. I sold my GTX480 on Craigslist and had a buyer two days later willing to pay $260 cash. That was a great bargain for him, and the GTX570 is an even better card.