When sourcing a Ram BOP, the price is heavily dictated by Working Pressure (WP) and Bore Size. Common pressure ratings range from 2,000 psi to 15,000 psi, while bore sizes typically vary from 7-1/16" to 21-1/4". You must ensure the unit features forged steel body construction (AISI 4130) for high-pressure integrity. Additionally, verify the type of rams included (pipe, blind, shear, or variable bore rams), as specialized shear rams will significantly increase the base price due to their complex metallurgy and cutting capabilities.