The only way I buy content is to swoop through and buy everything. Why don't you put an everything price on your site. Big programs would rather pick up all the goth content at once then nickel and dime in it, I think.
The only thing about selling like this is that people like me expect to pay merely a fraction of your regular asking price because we know that the average sale is less than a few hundred dollars and that sales of more than a thousand dollars are few and far between
Other ways... spend XXX get xx% off, etc, etc
Or you could create a club... one low price gets all your updates every month...
Or you could create a plug-in and lease it...
Or you could make CDs of 4-5 photoshoots each.
Just my
Brad