When I started hiring in 2017 $300 was the going rate, and with the bodybuilder-types I see for sessions based on (but not limited to) muscle worship, that hasn’t changed much. In my area of interest, the higher fees ($400+) attach to what some on this forum have termed “Adonis worship”, i.e., some combo of super tall, super built, super hung, super gorgeous, etc. Fortunately for my pocketbook, my tastes run more to shorter, tank-like, muscle-bound palookas.