It varies, but we cannot answer this question due to copyrights.
It varies depending on how it is armed, but due to copyright we can't tell any points values.
5 Marines = 90p. Each additional (up to a maximum of ten) costs 18p.+ weapons.
A space marine battle force consists of 1.Rhino/razorback 2.10 tactical marines 3.5 Assault marines 4.5 Scouts ---------- Depending on how armed, it can add up to roughly 500 points
A space marine captain costs 100 pts, but there is nearly half a page of upgrades to give him.