We provide my photos for corporate display use on a regular basis. The design companies all work with very good printers and framers, so we just provide digital files. I'm always amazed at how great the final images look, even at ridiculously large sizes. Our legal team works out the details on usage rights, etc. (Of course, we are not charging money for this, as we really do see it as a PR move for the university.)
The first thing I would do is have a phone conversation with the potential client, with you calling them at their publicly available phone number, just to make sure it's not one of the common scams aimed at photographers, many of which start out with an email asking to buy prints. (It's probably not, but it's nice to make sure.) In that conversation you can clarify how many photographs they will want, who will do the printing and framing, and what their budget is for photography. (Note that it will be much easier from a logistics standpoint for them to make the prints -- no shipping damage, no customs issues, etc.) Once you have all the particulars, you can figure out pricing -- which will be a broad range for this sort of thing. But corporate HQ buildings will be worth more than, say, hotel rooms. You can try Fotoquote, or pricing images on one of the big stock sites like Getty. Note that they will be paying hundreds of dollars per image for printing and framing, so the value of your work should be quite high.
Good luck and I hope it all works out.