I was talking to a guy a few weeks ago off ebay that buys and sells antiques and does some refining of gold himself. And he was saying the same thing. that he's noticed some very large up and down swing in the prices of scraps off ebay. and said he just plays the game and does what returns the best wheather that is just buy and resell or if he should refine it himself. and the same goes with antiques as far as if he should buy and sell right away or maybe hold on to it for a little while.
maybe because of the indian holiday, which they are partially explaining the jump in gold spot, is what is going on. honestly I have no idea but in some cultures or religions especially on a large scale could be the reason. I guess we will see. but until then save your self some time and make a few extra bucks and just sell your scrap.