Unfortunately, it can be more difficult to find free and inexpensive options for mesh heads and bodies for male avatars than female avatars. In particular, cheap male mesh heads (both static and Bento) can be hard to come by.
However, I recently learned that if you join the Alantori group for L$50, among the many free group gifts you can pick up from their in-store gift wall is the Marco Bakes-on-Mesh compatible male Bento mesh head, as shown here by the red arrow (here’s the exact SLURL):
Here is what the Marco head looks like with the included shape, wearing a Bakes on Mesh skin called Brent from 7 Deadly Skins (part of a group gift I picked up last June):
All I had to do was play around with the eyebrow sliders to fix the shape and position of the eyebrows, and he’s all set to go!
Please keep in mind that you will still need to find a Bakes-on-Mesh compatible mesh body to finish your avatar look. (For this quick-and-dirty single head shot, I just used the classic system body.)
Here’s a blogpost on how to find free and inexpensive mesh bodies for male avatars, which includes information on a few Bakes-on-Mesh compatible models. I keep this updated as I find new items, so bookmark it and check back often!