There are a number of projects which allow for website monitoring, but I required a relatively customized one (for educational purposes). Specifically, I wanted to monitor the Apple.com refurbished section for iPhone 12 models and receive a push notification to my phone when it appears there. To achieve this, I employed the use of Make.com, ScrapeNinja, and ntfy and was able to get it running in around 30 minutes.
Thank you! The ScrapeNinja app was finally approved and made public by the Make.com moderation team, so I hope ScrapeNinja will now help makers in complex real-world scenarios. Cheers!