Hi Cherry,
That sounds promising :o) I'm guessing that
by "non-promotional guest post" he wants to you to publish some
of his content on your site in exchange for a link?
... if you're actually looking for content,
and he's got a decent reputation as an expert - or at least good (preferably
unique) material - and it's going to help your site in the search engines and be good for your readers - I'd say "why
not".
Selling advertising is a a bit more
complex though. You've got choices, and the main ones are -
-
Sell graphical banners
-
Sell text adverts
Usually online advertising is charged
at a fixed cost per 1,000 impressions (e.g. 1000 displays of the
advert, which usually corresponds to 1000 pages viewed by your visitors).
... but to make life easier (and
save you from counting 1000s of impressions) you could sell him a
placement on a specific page (probably the homepage because it gets
the most traffic) for a fixed term, say a month. To do this you'd usually need to be able to offer some proof of the number of
visitors you get to your site, and the price you charge would depend
on the traffic you're getting, and how prominently the advert is
placed.
The other thing to keep in mind is that
the advert you put on your site will contain a link back to his
website, and that link will have value even if nobody ever clicks the
advertisement - because search interpret links as endorsements. More links = better ranking. So you'll be helping his
site to get a bump in the search engines just because you've placed
the advert. If you can share how many page views you're getting per
day, on average, to your homepage, I can probably give you a ball-park figure for an
opening offer you could make.
Hope this helps,
Cheers,
Niki