> plus I don't have to remember what the prices are at all three [grocery] stores I take your point that only the big things are worth sweating, but I feel lik

> plus I don't have to remember what the prices are at all three [grocery] stores I take your point that only the big things are worth sweating, but I feel like local comparison shopping is the sort of thing technology should make easy, and it still seems really hard. User uploaded systems, like GasBuddy, probably wouldn't work on so many items, unless uploading the price data could be automated somehow. If we could kill paper receipts and instead get per-item sales data pumped to our feed of choice (Mint? Email?), then it'd be much easier to build a system on top of that that would run weekly local price comparisons. If you really wanted only one trip, maybe it could compare your total shopping list. I know a lot of stores offer emailed receipts as an option now, it'd be a little more seamless if your payment system communicated your receipt preferences automatically, and if Mint or something like it was ready to catch that data.