A second hand T2 nosepiece adapter in good condition. Pushes into any 1.25" eyepiece holder and then gives you T thread on the other side. All you need is the T mount for your camera, and then your SLR is connected directly to your scope.
A second hand UGreen USB to serial adaptor in very good condition. Comes in original box with driver CD. Ideal for converting the serial port on your telescope to a PC for updating firmware and controlling via software.