Monitoro has released a new template to monitor price and availability, from any website in a few minutes.
Data is both synced to Sheets (or Airtable), and used to send alerts to Slack when the price drops, or the availability changes.
Of course, as any other Monitoro project, custom alerts and syncing rules can be created.
The complete tutorial + video is available here:
https://www.monitoro.xyz/post/how-to-make-a-price-tracker-with-google-sheets-and-slack-in-2-min