Had the opportunity to get an Omega 45D with two lenses for an unheard-of price, but need a tripod and head. Bogen and Manfrotto seem to be the makes most often recommended, but buying a large-format head/tripod new will cost me more than I got the view camera for! Is this something I can obtain used and be fairly assured of its reliability? I don't want to find my big heavy 45D slowly listing in the middle of a shoot. If these can be had used, what models should I look for?