yah you really have to explore all your options as prices change so much day to day and from retailer to retailer. you almost have to look daily for a week or 2 before finally seeing that great price you want to see.
i hate amazon's site as it is impossible to find what i want. i end up usually picking some options from better sites and then looking for that specific item. then sometimes you actually get other options offered that are what you are really looking for.
i hate searching for "1650 super" and getting 100 returns that are other models that happen to have a 50 in its name that i have to sort through. that's of course once you get past the 100's of other nonsense stuff that gets mixed in with the results like a vacuum...