I think everybody’s top price they would be pay for a blu-ray restoration project would greatly differ.  Also the price would vary depending on the title and its overall quality.

For me, personally, I take more interest in these projects from an archival perspective, as Monkeygift pointed out.  I want these films to last longer than two or three generations.  A lot of these 35mm prints are deteriorating quickly and who knows how much longer they can last.  I really want to help make sure our children and our children’s children get to see some of these films.  With the better the quality that we can preserve them, I believe there is a much better chance people 50 to 100 years from now will actually sit through and enjoy the movie.  My daughter is four right now, and in a few more years when I expose her to these old flicks, I don’t believe she’ll sit through a VHS quality Fu film.  20 years from now they may say the same about DVD quality.  That’s why I’m all for doing a blu-ray project right now and may shell out more for this reason before we lose more 35mm prints.