MicrostockGroup

I have been doing microstock for about 3 years making .25 to 4/ image.  I have had a few images sell for $28 and now on Alamy I am getting a few images that sell for > $300.

I was just contacted by a Hotel decoration consultant company, who saw my online portfolio, and liked what they saw.  They want to put some of my stuff in their portfolio.   If they sell my stuff I get 50%.

But.... they want to know what kind of price I would consider typical for a print assuming a particular size and media.  Anybody have a suggestion for someone like me?   I have a smugmug pro account so I can pick some sizes and media for prices but I am not sure what profit to put on a single print.