OKay, just too lazy to search and hunt around for this.

Each blog has pages. Usually listed at the top of the blog.
About, Advertise, blah blah blah.

Now, is this a good idea?
Has or does anyone do this?

And that is sell advertising in that the advertiser gets his/her own page?

Advertising (within reason as to length) can have a page just for their ad.

And what kind of monthly or yearly cost would one place on this type of advertising?