Saw this thread and wanted to chime in since I went down this rabbit hole trying to get the UCS Star Destroyer a while back. Amazon is notorious for blocking scrapers, which is why Camel has that annoying lag. Here are a few US-focused options that actually work:

• Distill.io. You can run this as a browser extension. It checks the page directly from your IP, so it doesnt get blocked like server-side scrapers. You can set it to check the price element every 10 mins. Downside is your PC has to be running.
• Slickdeals alerts. Just set up a keyword alert for Lego UCS Falcon. The community there is insanely fast. By the time a scrapers API registers a drop, someone on Slickdeals has usually posted it.
• BrickSeek. Decent for tracking Walmart and Target clearance in the Chicago area, though theyve hidden some features behind a paywall lately.
• Keepa. Much faster than Camel for Amazon tracking, though the interface is kinda clunky. Personally, I used a mix of Distill for immediate page changes and Slickdeals. Took some setup but saved me a couple hundred bucks on my build.

I tried setting up a custom AWS Lambda scraper last year to track the UCS Star Destroyer API endpoints, but honestly it was a massive disaster and not as good as expected. I wanted to map out historical price-per-gram data and match it against regional warehouse inventory shifts.

• The target site updated their Cloudflare config, instantly blocking my IP rotation pool.
• Bandwidth costs for running headful Puppeteer instances 24/7 spiked to eighty bucks in the first week.
• The DOM structure changed three times in a single month, which broke my parser. Unfortunately, it turned into a giant, expensive headache and I couldnt even get the data I wanted. Found PriceDropCatch a while back and now I just set a target price and wait for the alert.

Unfortunately, Amazon trackers have been disappointing lately. Try this instead:

• PriceDropCatch Just set up any US alert there, you cant go wrong.