Just starting to gather gear and have a few questions... What pieces of gear do you think are ok to purchase used? I keep my stuff in good shape, so some items, like my bc, I've purchased new. But since I'm not wealthy, I shop the sales and classified for good deals, but I'm unsure as to what could be considered a "safe" item to purchase used. It seems like a tank would be ok w/ good hydro/vip? What about reg's, weight systems, gauges, etc? Any advice would be appreciated, and thankfully received! Have a Nice Day, ...N