650 is outrageous ... to service a reg set ............ I used to love the parts for life from scuba pro ,then they stopped that unless you buy a bc reg and computer ....I did it myself as I am a trained scuba pro tech . ive seen to many regs serviced by the owners who have a "little knowledge " which is dangerous (also techs with little or no experience ) I know diy is a loaded subject ,but like finding a good Harley mechanic ..find a tech who knows his /her stuff then stick with them ..