Mainstream retailers often have a specific section for yarn that is no longer being produced, offered at a significant discount.
If retail stores are sold out, your best bet is buying from the stashes of other knitters and crocheters. Discontinued Yarn Yarn - Etsy
Discontinued Yarn Yarn - Etsy. Discontinued Yarn Yarn. Price ($) K+C Essential Wool High Tide 100% Superwash Merino Yarn (Worsted) Discontinued Yarns
: A specialized site that lists various vintage and discontinued lines.
Finding discontinued yarn requires checking both retail clearance and the secondary "destash" market. Start with official clearance sites to find brand-new skeins before moving to peer-to-peer platforms where other crafters sell from their personal collections. 1. Dedicated Clearance & Closeout Retailers