“This seller can’t ship right now” new scheme??

Hi all, I’ve been noticing A LOT of accounts over the past couple days have very sought after items priced insanely low (ie a single stitch shirt that would go for 80+ for about $2) but their account has vacation mode on. I thought it was just well, vacation, until i saw several doing it. Most also link out to their storefront on other sites where surprise, the item costs way more and can be bought immediately. It’s really bogging down my searches when im trying to find other items and it’s so frustrating. Anyone else notice this???