DQ, I TOTALLY understand. I didn't get my Polar scarf and I have been searching for about a decade. What is maddening is that it was totally affordable, I just wasn't on ebay when it went up. What can you do?
I do think that the price on your grail was very steep given the condition it was in. It will come up again though, you just have to keep looking.
One thing to keep in mind though, because this one went so high. Somewhere, someone who has one in the back of her closet, might decide to sell. I know if I had one around and thought I could get anything close to $700, it would be on ebay so fast it would make your head spin. Good luck!