SmallRig from Shenzhen has existed since 2012 and designs its products together with users, which shows in the details: cages with an Arca-Swiss compatible base plate, cable clamps for HDMI, cold shoes in the right place and access to every door. The range covers cages and L-brackets for almost every camera from Sony, Canon, Nikon, Fujifilm, Panasonic and Blackmagic, universal handles, 15mm rod systems, matte boxes, follow-focus units, monitor arms and the RC series LED lights.
On used rigging we check the fit on the intended camera model (a cage for the A7 III does not fit an A7 IV), every thread for damage, the included screws and hex keys, and the clamps and quick releases. Light scratches are noted, but aluminium rigging still works perfectly after years.
Check the product page for which camera the cage or bracket is made. A cage plus top handle is a good base; rods and a matte box follow when you want to work with filters or a follow focus. We buy your old rigging.