  We aim at quantitatively determining transport parameters like conductivity,
mean free path, etc., for simple models of spatially completely disordered
quantum systems, comparable to the systems which are sometimes referred to as
Lifshitz models. While some low-energy eigenstates in such models always show
Anderson localization, we focus on models for which most states of the full
spectrum are delocalized, i.e., on the metallic regime. For the latter we
determine transport parameters in the limit of high temperatures and low
fillings using linear response theory. The Einstein relation (proportionality
of conductivity and diffusion coefficient) is addressed numerically and
analytically and found to hold. Furthermore, we find the transport behavior for
some models to be in accord with a Boltzmann equation, i.e., rather long mean
free paths, exponentially decaying currents, while this does not apply to other
models even though they are also almost completely delocalized.
