I got a photorequest from an agency planning an advertising-campaign for an airline. They want to use one of my photos for the following prupose:
Outdoor-ads (billboards etc.) and ads in magazines and newspapers over the period of 6 months.
They do not (yet?) have any more specific details, so I'll have to base my price-quote on these facts. Now my question to those of you guys with a little more experience in selling their photos (so far I've only had very few and considerably smaller sales): How much would you ask for when giving them a fair price (not at the top of the possibly reachable scale) but without giving away too much.
As they want a quick answer (as always...) any quick help is highly appreciated!