I just checked the commercial journal "Marine Geology". It does not charge authors unless they have color figures in the print version. On the other hand, subscriptions are unaffordable for people like me. Libraries pay thousands of $ for a subscription. I imagine that for a library to get electronic access to all of the Elsevier journals would be a lot of money.
(blank line for Cathryn. One earth scientist who was past editor of a major journal of an earth science society will not edit or review articles for commercial journals. I'm not sure why, but I think it is the cost to libraries and/or the "for profit" part rubs him/her the wrong way.

Part of what got me in trouble for JGR is that online color figures are free, more or less, and you can submit with all color figures. Then, when the paper was accepted I found that half the figures would not work well in B&W. But, the real problem was length. My intention is to never write a paper that long again: it was hard to keep track of, it took years, and may not be read by many (although the snazzy color figures should at least be looked at by some). The journal Geology has a very strict 4 page limit, and by contrast with JGR, writing it was relatively painless. It was accepted 1 year after a worked on the first draft, and only 3 months after it was first submitted. I benefitted from careful editing/revisions by co-authors.

I generally put $1000 or $1500 into a proposal for page charges. That would normally be enough for a short paper with B&W figures. But, it takes so long for me to get a paper accepted, and there is no good mechanism at UCSB to set aside that money after a contract is done, that we use it for other things like salary. So, my problem that I had to later take $ from salary for page charges.
Chris