Years ago I bought some cheap Chinese knockoff plastic models: crusader (maybe Pixie), stinger, LAM, and LAM aero.
They're very much the wrong scale for battletech, maybe 1/200. They do have some moving parts, which is interesting.
A good modeler could likely do something really cool with them, but it would take a lot of work to make them look like anything better than what they are.
I assembled the LAM, but the rest are all new on sprue. Free to whoever wants them.