No idea where to begin - pricing for usage?

[stacie]

I recently did a shoot for an ad agency that needed some photos for a brochure. I was paid for the shoot, but now they want to use the pictures for something else as well. I need to figure out pricing for future usage very quickly, but I really don't even know where to begin. I mainly shoot weddings, so this is not my usual area whatsoever.

I apologize if this is something that gets asked a lot, but I'm not even sure how to search for it - so if someone wouldn't mind pointing me in the right direction, I'd really really appreciate it!!

Thanks a bunch!
Stacie

[park]

Here are three sites that might be of help.

http://photographersindex.com/stockprice.htm
http://www.hindsightltd.com/products/priceguide.html
http://www.cradocfotosoftware.com/

Park Street
Austin TX
http://www.parkstreets.com