Considering the amount of knowledge you have, the time you've put in, and the expense to you, around $100 seems like a fair price. I say go for color unless the color doesn't add much. I don't know how the graphics have been designed so I don't know how well they hold up in B&W or in gray.
A PDF version would be great too, if you could figure a way to not have to worry about it being passed around for free. PDF's are easily searchable.
Sorry I'm a bit late in posting, but whatever the price is, I'm in. Haveing spent a long evening a year and a half ago reading whichever version of the draft it was and also spending more than an hour watching the DVD, I'm willing and happy to pay $100 for even a B&W only version of this book. I know it will be well worth whatever price you decide to set.
Afterall, where else can someone get all that info in one place?
Ron - Congratulations on this labor of love. I know you've spent a lot of time and money on this book.
PS - if you need more reviewers...
PPS - I'm willing to send in $50 as a down-payment to help get the first run printed.
For up from the ashes, up from the ashes, grow the roses of success!
Considering it is a textbook of some respectable volume (and labour), I'd pay more than $100USD for a copy. I dont mind saving for books, knowledge is the only thing worth investing in these days anyway.
I'm also heavily in favour of colour printing. It may not be art, but it is science - accuracy in the reproduction should be high on the agenda, and I dont think black and white would really cut it.
Alright, looks like the $90 - $120 range is doable for the B&W version. I'm looking at the color version. I have 4 copies of the B&W version here for the editors and am about to dupe the DVDs. There may be a CD as well with some extras (cookies again). I'll keep you posted. The DVDs will probably be in the $100 range.