> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://alltheleads.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What is an aged expired lead?

An aged expired lead refers to a property listing that was on the market but expired or was withdrawn without a sale, typically 20 to 30 days prior.