Not specifically, just shopping.google.com. I try to check there if I don't think the prices at my normal outlets are good enough. For instance, I needed some bags for my vacuum cleaner a while ago, and they were too high at both the manufacturer's site (Bissell) and at Amazon. There were off-brand bags at Amazon for less, but the reviews were terrible. So I think I looked on Google shopping, and ended up finding a great price for the OEM bags at target.com. While I was there, I got some dental floss that works well for me, because it was also really cheap there.
In another example, my now-ex wife wanted some specific sea salt from Italy that she likes a lot for some reason. Amazon's price was very high, so again I used Google (I think, this was probably a year ago) and found a site that specialized in Italian food imports. They had dirt-cheap prices for the stuff if you bought it by the case, so that's what we did, plus a bunch of other pasta stuff that was really cheap.
There's tons of specialty stores out there like that that you just have to look for, depending on what you're looking for. shopping.google.com frequently points me to good places, but also just a regular Google search, or a search on DDG will frequently be productive. Even other big-name retailers will frequently have good deals, better than Amazon: walmart.com, target.com, etc. But it all fluctuates and varies a lot, so it is a bit of work to find good deals. But generally, once I've found a good supplier for something I repurchase at some interval, it usually works out best to keep buying from them, so it's frequently worth the time investment to find a good supplier. Then I just keep all my email receipts tagged "Purchases", and then do a search through those when I need to re-order something.
