From my past experience, even if you miss the bottom on memory prices (I think it will drop more), you will usually get an opportunity to buy cheap memory with rebates after the prices start back up. This is how and when many people get the free after rebate stuff. This is usually name-brand stuff too.
If you really need ram like right now, these are good prices. If you can wait, I would wait a little longer and don't stress the little one dollar swings.