Would they end up being a competitor to your site? if so why would you deal with them. or do they want it for some kind of internal tool? You could sell them a

Would they end up being a competitor to your site? if so why would you deal with them. or do they want it for some kind of internal tool? You could sell them a license to run a custom version on their own system. Are they looking for you to make all the changes? then to support it? do they want the source?