I used streeteasy[0] almost exclusively during my home search. They label every listing by home type (co-op, condo, townhouse, etc)

I don't think I found a condo under 800k, while there are plenty of co-ops across the boroughs, including Manhattan, in the 300-800k range.

EDIT: just noted you said "in another place". In my experience it's very hard to find this information in America outside NYC without investigating individual buildings.

[0]: https://streeteasy.com/for-sale/nyc/price:300000-800000