To answer the OP, I definitely think readers are going to make it worth the time/money/effort to put out backlisted books. Yes, there will be a few people Kindle bombing over the price point, but publishers don't care about that.
Relatively recently, and to my utter delight, 3 older Wrede books were re-released, including this one:
http://inkmesh.com/ebooks/seven-towe...book/?qs=wrede
They put it in ebook form, made a pretty new cover for it, and listed it for $7.99. I was happy to pay it - my older copy was falling apart from use. I think I've seen one Kindle bomb on these three ebooks - the rest of the reviews have been from fans like me who have been praying and wishing and hoping that Wrede's works would be ported over to e-form.
There's definitely money to be made here. I feel like the OP was a little challenging: Are you going to make it worth the publisher's effort? If you're seriously asking, then my answer is: yes. I have and I will continue to.