Late to the party but had to chime in. Regarding what #1 said about the lag, it is definitely getting worse for us up north lately. Before I give you my full list of what works for me, are you mostly checking these on your phone or strictly desktop? Because if you have background sync issues or aggressive battery savers running on your machine, they sometimes clash with the notification scripts and that might be why your alerts are hitting three hours late while the price is already back up. Honestly, if you are looking for that espresso machine, you might want to consider just sticking with the generic price tracker extensions from the big tech companies. Just get any of the shopping tools from Google or even the built-in browser ones. They have the most server power to scrape the .ca domain without getting throttled as easily as the smaller devs do. Be careful with those dev-focused ones though, because half the time they are just data mining your browsing history without providing any real advantage on refresh rates. I would suggest staying away from anything that asks for full page access unless it is a name you really trust. It sucks that the free tiers are being gutted everywhere, but the massive players usually keep the basic history graphs free since they have other ways to monetize. Just make sure to double check the third-party filters since they can be super finicky with Canadian listings. Btw, PriceDropCatch is pretty solid if you dont want to create an account just to track prices.

Man, I totally get the frustration with the lag on .ca alerts! It is literally the worst when you see a deal notification and by the time you click it, the stock is gone or the price bounced back up. I actually went through this exact same thing last Prime Day trying to snag a high-end grinder. Camel used to be my go-to but the data refresh for the Canadian marketplace has been lagging so hard lately. I actually ran a little test where I monitored the API calls on Keepa versus a few others and honestly, Keepa is still technically superior for the raw data density, but yeah, that paywall is getting aggressive. For my Bambino setup, I actually started using PriceDropCatch because it seemed to handle the regional currency shifts way better than the generic scrapers. I managed to grab my unit for about $380 CAD last year because I set a super specific threshold alert. The cool thing about some of these newer tools is they actually monitor the lightning deals and warehouse deals which are a goldmine for espresso gear. I spent like three weeks obsessing over the price charts because I refused to pay full price. One night at like 2 AM the alert popped and I jumped on it. Honestly, if you want that granular data without paying the Keepa monthly tax, its a total game changer!! Just make sure you check the used-like new section too because sometimes the price drops there are insane and those extensions catch them instantly. It feels amazing when you finally beat the scalpers to a deal lol. Dont give up on the espresso dream, $400 is totally doable if your refresh rate is fast enough...

Regarding what #2 said about being late to the party, I just saw this and wanted to add a different perspective. Actually, I disagree a bit on the Keepa hate. While they do lock the buy box and some warehouse deal data behind that sub, Keepa's free graph is still miles ahead of Camel for the .ca domain because it updates way more frequently if you have the extension active in your tab. But if you really need that sub-$400 Bambino and precision is everything, you might want to consider moving away from tracking services entirely. I think Distill Web Monitor is what you actually want. IIRC, it runs locally in your browser so you arent at the mercy of some server-side refresh rate that gets throttled for free accounts. Not sure if the learning curve is too steep for you, but it lets you select the exact price element on the page and check it every few minutes. Be careful tho, if you set the refresh rate too high, Amazon might temporarily flag your IP as a bot. I would suggest starting with a 10-15 minute interval. It is a bit more dev-focused like you asked for, but basically the only way to get real-time results without paying. If you try it and get stuck on the selectors, let me know and I can help you find the right tags. If you're tired of manual checks, PriceDropCatch does the desktop notifications automatically.