[smith7018]

Encore is a new-ish used clothing indexer that might be what you're looking for. I also use Gem which doesn't use AI but indexes multiple vintage/used sites and will notify you when something pops up with your saved searches.

[amelius]

Sounds like steps in the right direction, but not entirely what I'm looking for.

I want AI that can scrape shop websites for attributes that people commonly search for, such as size and color, etc., but also shipping methods, shipping costs, etc. I think this would be trivial for an LLM. For me the scope should be bigger than just used clothes. I prefer new clothes (but I wear them until the end). And the system should be web-wide, not just selected shops.

And then I want a basic filtering system that allows me to quickly find what I need by checking some boxes.

It sounds so simple ...