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Based on our record, Keepa seems to be a lot more popular than Shop By Sub. While we know about 80 links to Keepa, we've tracked only 4 mentions of Shop By Sub. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I also recommend checking amazon.co.jp out as you'll have the option for certain products to ship to a konbini closest to your lodgings for pick up (they e-mail you a QR/barcode and you show it to the attendant; if you miss the pick up, they automatically return and refund you). This is especially useful if you're short on time and will help you streamline your itinerary so you're not going super far out of your... Source: 6 months ago
When buying off Amazon, always use https://keepa.com/ to track the price and get the best deal. Always read the seller reviews (product reviews are usually fake and useless). Source: 6 months ago
PSA: You can use a tool like Keepa to view historic prices of items on Amazon. It's a browser extension that injects into Amazon's website underneath the initial product listing. Will show you normal prices, the used prices, if the price was a lightning deal (a la Prime Day etc). Source: 11 months ago
Keepa.com is actually better. I have been using camelcamelcamel for years, but it started to NOT show the correct historic for a few items. But the keepa extension solved it. Source: 11 months ago
Keepa.com is my go to site for price history. Source: 11 months ago
Oh wow I did something very similar, just dumber. https://shopbysub.com I have a raspberry pi gathering Reddit comments with an Amazon link in them every hour, then exposing them on Shop By Sub categorized by subreddit, sorted by upvotes. Same with OP I put my Amazon referral link in there. It's been decently well-received by Reddit, but I have a hard time getting recurring users. It seems like they just forget... - Source: Hacker News / almost 2 years ago
In fact, I liked Reddit so much as a recommendation engine, that I built https://shopbysub.com so folks can browse Amazon product recommendations by subreddit with context and sorting and stuff. e.g. I've been gardening lately and came across a moisture meter on https://shopbysub.com/r/gardening that I wouldn't have otherwise. It's been instrumental to help my overwatering problem. Source: about 2 years ago
I created a site (https://shopbysub.com) that kind of does this. You can browse amazon products that have been linked by redditors in comments by subreddit - e.g. https://www.shopbysub.com/flashlight. Source: almost 3 years ago
I did a thing to somewhat help mitigate this problem. I made https://shopbysub.com which groups Amazon products left in reddit comments by subreddit, and makes them sortable by amount of upvotes. So you can go to e.g. https://shopbysub.com/r/BuyItForLife and see all the amazon products more or less recommended by redditors. Source: about 3 years ago
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
Fakespot - Fakespot spots, analyzes and identifies fake reviews - helping you out when buying stuff online
PriceSpy - PriceSpy helps you save money when shopping online.
Reddit Bests - Discover products trending on reddit
Savelist - Found products you want but not ready to buy?
TheReviewIndex - An Amazon review summarizer using neural networks