This blog post is straight forward and useful: https://www.datawire.io/4-simple-strategies-for-managing-your-aws-costs-with-reserved-instances/ https://www.data

This blog post is straight forward and useful: https://www.datawire.io/4-simple-strategies-for-managing-your-aws-costs-with-reserved-instances/ https://www.datawire.io/4-simple-strategies-for-managing-you... tl;dr: Configure your reserved instances to be region-scoped; buy in a popular region; pay-as-you-go not upfront; sell your excess reserved instances (like you mentioned)