Back to the original discussion of the cost of stock photography usage for a wall. I had a situation come up last year where I needed information industry standard rate on a 4 foot x 8 foot ad sign. The person that I asked had a copy of pickerall's book ( I think the author is named Jim Pickerell book can be found
http://www.pickphoto.com/guide.asp) and he publishes a book yearly of the going rate for all sorts of usages for rights managed images, as well as unlimited licensing. The rights managed for the term that I was looking at was listed as a six month right to usage of the 4'x8', and if memory serves me correctly it was in the neighborhood of 1800 per image per six months as an industry standard. If the company is thinking about wanting unliimited rights to the images, I would think that somewhere on the order of 4-6 times that amount would be in their ballpark.
Good luck, and I hope you ended up feeling like you ripped them off, and that they feel the same about you.
