Rancourt starts around $200. Their styles lean casual, and their dressier options (and certainly their boots) cost more, but the construction and materials are really good.
Rancourt does make nice shoes for under $400, and so does Red Wing. Meermins are a Spanish brand you can get for under $400. Aside from that, it’s $400+ for Grant Stones and $600+ for Aldens, and even higher for Viberg, Edward Green, etc.