I shave my head and face in the shower.
For cheap products, I find that if I desire a Glossy Look, Aloe gel rubbed in after I get out and dry leaves a nice, shiny pate.
If I want a Matte Look, a small dab of el cheapo Suave clarifying hair conditioner, rubbed in then rinsed off real well, leaves a nice, soft, matte look.
Either way, dirt cheap.