I came across a similar treasure pile a few weeks ago. Servicing it was too pricey, so I took it Diver Dan's in Santa Clara. They donate things like the wetsuits, fins, etc. to groups that teach the disabled to scuba dive (used as pool equipment). The regs and stuff are tricky since there's almost no value for them on ebay. I think if you give them to the dive shop they'll sell them on ebay and keep the cash or donate them.