And we have no idea whether these RAM will be Mac compatible. In fact, we have no idea what brand they are or what type of chips will be on them, because it changes week to week.
Remember you will pay full price plus taxes up front and wait weeks for the rebates. If you have a G5 tower, you have to buy 2, and the rebates are only on the first one.
Before buying, check who pays the shipping if the RAM is not compatible and needs to be returned, likely it will be you paying both directions.